Working Group I.2 of IAGA - Electromagnetic Induction in the Earth ================================================================== Electronic Newsletter #10: 1995 -------------------------------- Previous newsletters: enews.Oct92 - 1st enews.Jan93 - 2nd enews.Feb93 - 3rd enews.Oct93 - 4th enews.Feb94 - 5th enews.Mar94 - 6th enews.Jun94 - 7th enews.Aug94 - 8th enews.Sep94 - 9th enews.Jun95 - 10th (this one) This is the tenth electronic newsletter for our group. A newsletter will be sent around when there is enough material, or a special event about to come up, to warrant distribution. Not all of us in the working group have access to an email address; if you are aware of colleagues who are not likely to receive this newsletter, please give them a paper copy (but chastise them for using trees instead of electrons). Also, please forward this to colleagues who may not yet be on my email list and ask them to forward their address to me. Copies of previous electronic newsletters can be obtained by anonymous ftp login to mtnet (either europe or northamerica) in directory pub/mtnet/docs. Please submit any comments/articles/news-items/gossip/corrections to jones@cg.emr.ca Contents: >>>10.1 Boulder IUGG: Session dates >>>10.2 Boulder IUGG WG Business meeting >>>10.3 1996 EM workshop and MT-DIW3 >>>10.4 1996 IGC meeting in Beijing >>>10.5 Japanese Fracture Imaging Meeting >>>10.6 Romanian Meeting >>>10.7 Classified Advertisements >>>10.7.1 Ecole Polytechnique >>>10.7.1 Western Atlas >>>10.6 MTNET news >>>10.9 Other news >>>10.9.1 Electrode Comparison >>>10.9.2 LOTEM Group >>>10.9.3 RRI News & How to Obtain RRI >>>Appendix: Email list -------------------------------------------------------------------------------- >>>10.1 Boulder IUGG: Session dates =================================== These are the dates of sessions of interest to EM people. Also included are some of the tectonics-related sessions, business meetins, and some social events. Sunday July 2: eve Opening Ceremony Monday July 3: V JW1 Electromagnetic Effects of Earthquakes and Volcanoes GA 5.01 Modern Observatory and Repeat Station Instruments and Practice GA 7.01: Activities and Results of the International Equatorial Electrojet Year (IEEY) eve First Conference of Delegates Tuesday July 4: S JW1 Geophysical Networks Possibilities for and Problems With Co-Location of Instruments eve Fireworks at Folsom football stadium Wednesday July 5: GA 1.10 Multidimensional mathematical advances in electromagnetic induction: decomposition, modelling and inversion. GA 5.02 Ocean Bottom Geomagnetic Observatories GA JS5.18 Architecture of the continents: Interpretation of their main structural elements from magnetic anomalies and other geophysical data S W3 Acquisition and Processing of Deep Crustal Seismic Data Thursday July 6: S 3 Continental Evolution Revealed in Geophysical Transects S JS4 Patterns in the Earth's structure and dynamics: Observations, Earth models, and laboratory measurements Friday July 7: GA 5.10: Geomagnetic Indices V JS2 Subduction Zone Processes At 25-200 Kilometers Depth: The Subducting Slab, Mantle Wedge, and the Slab-Mantle Interface eve IAGA Working Group I.2 Business Meeting *************************** Saturday July 8: GA JS1.07 Lithospheric anisotropy: observations and interpretation eve IAGA Div I Business Meeting Monday July 10: U6 Origin and evolution of the continental lithosphere GA 1.12 Electromagnetic studies of the solid Earth. S 7 Rheology and Lithospheric Deformation Tuesday July 11: U7 Inverse problems in geodesy and geophysics GA JS1.08 Geophysical signatures of modern and ancient continental margins eve Second Conference of Delegates Wednesday July 12: GA 1.11/2.16/5.08 Multidimensional currents over multidimensional Earth structures: theory and observations Thursday July 13: GA 5.09 Field Behaviour On Non-Active Days At World Locations GA 5.22 Local Time Changes of the Earths Magnetic Field Caused By Recent Tectonic Processes (Tectonomagnetic Method) GA JS1.02 Relating geophysical measurements to lithospheric processes through continental drilling. S 15 Dynamics of the Subduction Process S JS8 Modelling the Earth's Interior S JW2 Geophysical Data Challenges in the 21st Century Friday July 14: -------------------------------------------------------------------------------- >>>10.2 Boulder IUGG WG Business meeting ======================================== Our Working Group, IAGA I-2 "Electromagnetic Studies of the Earth", will have the Business Meeting on FRIDAY 7TH JULY. I hope that as many of you as possible will attend the meeting. One issue that we must address is the rotation of some of the members of the WG Committee. The current and next committee is as follows:- -> IUGG 1996 1996 - 2000 Al Duba (Chairman) U.S.A. Alan Jones (Co-Chairman) Canada Alan Jones Eduard Fainberg Russia Yoshi Honkura Japan Yoshi Honkura Malcolm Ingham New Zealand Malcolm Ingham Andreas Junge Germany Andreas Junge Ebong Mbipom Nigeria Ebong Mbipom Ana Osella Argentina Ana Osella Laust Pedersen Sweden Laust Pedersen B P Singh India Lazlo Szarka Hungary Lazlo Szarka Pascal Tarits France Pascal Tarits Observer status: George Jiracek U.S.A. Mario Martinez Mexico Xiang Ru Kong China We must replace Al Duba, Eduard Fainberg, and B P Singh. Please think about names of people to go onto the committee. You can either send the names to Al Duba or I prior to the IUGG, or be prepared to nominate your candidate at the working group meeting. If you have any topics for discussion at the meeting, please contact either myself (jones@cg.emr.ca) or Al Duba (al.duba@quickmail.llnl.gov). -------------------------------------------------------------------------------- >>>10.3 1996 EM workshop and MT-DIW3 ==================================== (submitted by Yoshi Honkura) (1) MTDIW-3 (1996) Meeting place: Geological Survey of Japan (GSJ), Tsukuba July 8 Arrival (GSJ, Tsukuba) 9-10 MTDIW-3 11 Departure for Onuma, Hokkaido For details contact Yasuo Ogawa (oga@gsjrstn.go.jp) or Toshi Uchida (uch@gsj.go.jp) (2) Induction Workshop Place: Onuma International Seminar House, Hokkaido, Japan Date: July 12 - 18, 1996 7/11 Arrival 12-13 Sessions 14 Events (with Local Town Office) 15 Excursion (Usu Volcano, Mori Geothermal Power Plant) 16-18 Sessions 19 Departure Hosts: IAGA Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS) Onuma: The Onuma International Seminar House is located in a forest near Lake Onuma, which was created by the eruption of Komagatake Volcano, in Hokkaido, the northernmost island of Japan. Onuma was selected as one of the most beautiful three landscapes in Japan, and in 1958 it was designated as a quasi-national park. The Local Organizing Committee and the Local Town Office welcome all the participants in an atmosphere embraced by nature. Scientific sessions: Various topics of electromagnetic induction in the Earth will be considered by a program committee; topics on geothermal exploration and prediction of earthquakes and volcanic eruptions are welcome. Details will be announced in the second circular. ======================================================== Preliminary Registration Please send, preferably via e-mail, the following information not later than November 30, 1995 to: Yoshimori Honkura Department of Earth and Planetary Sciences Tokyo Institute of Technology 2-12-1 Ookayama, Tokyo 152, Japan E-mail: yhonkura@geo.titech.ac.jp Fax: +81-3-5499-4093 Name:______________________________________________ Affiliation:_______________________________________ Address:___________________________________________ Fax:___________________ E-mail:___________________ Preliminary title of a paper which you intend to present at the workshop:___________________________ ___________________________________________________ ======================================================== -------------------------------------------------------------------------------- >>>10.4 1996 IGC meeting in Beijing =================================== THe 30th International Geological Congress (IGC) will take place in Beijing between 4 - 14 August 1996. This is an excellent opportunity for those of us in our community who are showing that EM studies can make significant contributions to geological/ tectonic studies. The meeting is two weeks after the EM workshop in Hokkaido (see 10.2), so you can have a two week holiday in either Japan or China, then go to the IGC. The sessions that I know are of interest to some of us are:- Special Symposium D: Structure of the Lithopshere and Deep Processes D-1 The nature of the lowqer crust and the exchange between the crust and the mantle D-3 Anisotropy of the mantle and mantle rheology D-5 Global Geoscience Transects D-6 Continental scientific drilling and site selection D-7 Lithospheric structure, composition, and dynamics of orogenic belts Special Symposium F: Global Tectonic Zones F-1 Formation, evolution, and dynamics of the Tethyan tectonic domain F-2 Tectonic evolution and the mechanism of uplift of the Tibetan plateau F-6 Lithospheric structure and dynamics of the Antarctic continent and its continental shelf F-7 Continental rift systems and their genetic mechanism F-8 Tectonic evolution of the African continent F-9 The break-up and accretion of the Asia continent Special Symposium G: Orogenic Belts G-1 Types of orogenic belts, processes, mechanisms and models of orogeny G-3 Kinetic partial melting and fluid effects in the crust of orogenic belts Special Symposium I: Energy and Mineral Resources for the 21st Century I-2 Prospects for exploration of energy and mineral resources I-3 Distribution, assessment, and prediction of geothermal resources Special Symposium K: Progress of International Geoscience Projects K-1 Understanding the continental lithosphere: results from the application of a diversity of approaches Symposium 13: Geophysics 13-3 Electromagnetic properties of the crust and mantle 13-4 Exploration geophysics The Second Circular was distributed in April, 1995. To receive more information, the Second Circular asks that you contact:- Prof. Zhao Xun Deputy Secretary General 30th Internation Geological Congress P.O. Box 823 Beijing 100037 P.R. CHINA Tel: 86-10-8327772 or 86-10-8323188 Fax: 86-10-8328928 email: zhaox@bepc2.ihep.ac.cn The abstract submission deadline is NOVEMBER 1ST 1995. -------------------------------------------------------------------------------- >>>10.5 Japanese Fracture Imaging Meeting ========================================= (submitted by Toshihiro Uchida) ----------------------------------------------------- Call for Papers 3rd SEGJ/SEG International Symposium Geotomography - Fracture Imaging - November 8-10, 1995 The Society of Exploration Geophysicists of Japan (SEGJ) now issues a Call for Papers for 3rd SEGJ/SEG International Symposium on Geotomography, scheduled for November 8-10, 1995 at NIHONDAIGAKU-kaikan, Tokyo, Japan. The symposium is cosponsored by the Society of Exploration Geophysicists (SEG). In order to reflect the trend of research since the 2nd symposium held in November 1992, this 3rd symposium will put its focus on "Fracture Imaging". Fractures in various scales play important roles in many fields of science and industry, such as oil industry, geothermal engineering, civil engineering, and environmental engineering. Several invited speakers will review the fractures in various disciplines. Technical sessions will cover "Fracture detection and Imaging technology" and "Characterization of fracture network". The term "Imaging" will include not only visualization but also measurement and mapping of fracture properties such as orientation and spatial distribution. The presentation will include theory, experiments and case studies in the related technology. Papers that relate the tomography results and the fracture characteristics are highly welcome. Technical papers are requested for both oral and poster sessions. Short abstract of 400-500 words should be sent to either of the addresses below, by April 30, 1995. Specify oral or poster of your choice. Please supply us with your e-mail address or telefax number as well as your full address so as to establish convenient communication. After the notification of the acceptance of oral or poster presentations, all the speakers are requested to submit full text in specified format by August 31, 1 995. The proceedings will be handed to participants at the symposium. The speakers are encouraged to submit their original papers to BUTSURI-TANSA, the journal of SEGJ. Technical sessions including panel discussions will be covered by the simultaneous bilateral interpretation between Japanese and English languages. Short Abstract Deadline: April 30 1995 Full Text Deadline: August 31 1995 Abstract should be sent to: Dr. Toshifumi Matsuoka Chairman of Organizing Committee 3rd SEGJ/SEG International Symposium Japan Petroleum Exploration Co.,Ltd. NYK Tennoz Bldg. 2-2-20, Higashi-Shinagawa Shinagawa, Tokyo 140 JAPAN Tel: +81-3-5461-7324 Fax: +81-3-5461-7397 E-mail: toshi@japex.co.jp or Dr. Arthur Cheng Head of Organizing Committee in SEG 3rd SEGJ/SEG International Symposium Earth Resources Laboratory Massachusetts Institute of Technology 42 Carleton Street Cambridge, MA 02142, USA Tel: +1-617-253-7206 Fax: +1-617-253-6385 E-mail: cheng@erl.mit.edu -------------------------------------------------------------------------------- >>>10.6 Romanian Meeting ======================== The Romanian Society of Geophysicists will host an International Geophysical Symposium on 25-27 October, 1995, in Bucharest. The Technical Programme "will cover a wide range of subjects". Abstract deadline is 14 JULY 1995. For more information contact:- International Geophysical Symposium Secretariat P.O. Box 31-54 73250 Bucharest Romania fax: 40-1-321 2122, 40-1-250 2594 tel: 40-1-635 5470 / 100, 165 -------------------------------------------------------------------------------- >>>10.7 Classified Advertisements ================================= >>>10.7.1 Ecole Polytechnique ============================= (submitted by Dean Livelybrooks) POSITIONS AVAILABLE at the ECOLE POLYTECHNIQUE, Montreal -------------------------------------------------------- The Chair in Borehole Geophysics at the Ecole Polytechnique in Montreal, Quebec is charged with developing geophysical methods for the detection and delineation of deep ore bodies. We have chosen to concentrate on Ground Penetrating Radar (GPR), Radio Imaging Methods (RIM), and Resistivity/Induced Polarity (IP) methods. Striking RIM images depicting mineralized zones, and strong GPR reflections from a sulphide body have already been observed in tests at Sudbury, Ontario. We now plan additional field trials of these techniques and the development of electromagnetic tomographic and modeling programs for data analysis. Two positions are available. ------------------------------------------------------------------- RESEARCH ASSOCIATE in Radio Imaging Methods ------------------------------------------------------------------- Duties: *) develop 2- and 3-D modelin and tomographic programs. *) analyse and interpret survey data. background requirements: PhD in geophysics, geology, physics or applied mathematics with strong computational skills. Working knowledge of FORTRAN or C programming languages. ------------------------------------------------------------------- POSTDOCTORAL POSITION in Borehole Resistivity/IP Methods. ------------------------------------------------------------------- Duties: *) install and develop 2- and 3-D modelin programs for use in feasability studies. *) interact with mining company personnel to define type models of deposit resistivity and chargability. *) cooperatively maintain 13 SUN workstation and 10 PC network. background requirements: PhD in geophysics, geology, physics or applied mathematics with strong computational skills. Working knowledge of FORTRAN or C programming languages. ------------------------------------------------------------------- please send your CV and references to: Michel Chouteau, Teck/Golden Knight Chair in Borehole Geophysics Department de genie mineral (Mineral Engineering) Ecole Polytechnique P.O. 6079, succ. "Centre Ville" Montreal, H3C 3A7 CANADA (514)-340-3971 (514)-340-3970-F chouteau@geo.polymtl.ca or: Dean Livelybrooks (same address) (514)-340-3710 dlivelyb@geo.polymtl.ca >>>10.7.1 Western Atlas ======================= (submitted by Hana-Martin Maurer) DATE: May 12, 1995 SUBJECT: Post doctorate position Geophysicist / Electromagnetic modeler We are seeking the following research person to join our research and development team who is developing advanced borehole logging technologies for our worldwide operations. Our research involves the quantification of formation evaluation principles and also relating them directly to the engineering requirements for borehole tool design. The outstanding individual selected for this post should fulfill the following requirements: Qualifications: Ph. D. in geophysics or a related science field with emphasis on numerical modeling. Experience with the modeling of electromagnetic fields in inhomogeneous media with preference to the method of integral equations is advantageous. Job Description: The successful candidate will be located in the scientific research department of our technology division and will work within a small international project team. Excellent computer facilities are provided. The salary will be at reasonable industry levels. Applicants should send their resumes to the following address before July 31, 1995: Dr. Bentsion Zinger Western Atlas Logging Services P.O. Box 1407 Houston, Texas 77251-1407 USA Tel. cc+713-972-6573 or to Dr. Kurt Strack Western Atlas Logging Services P.O. Box 1407 Houston, Texas 77251-1407 USA Tel. cc+713-972-6547 Fax cc+713-972-6565 email strack@igor.aws.waii.com -------------------------------------------------------------------------------- >>>10.6 MTNET news ================== You can access mtnet through World Wide Web. For mtnet-northamerica open: ftp://mtnet-northamerica.cg.emr.ca/pub/mtnet For mtnet-europe Adam Schultz writes: Users may get into our system by opening the URL: http://www.esc.cam.ac.uk which gets them into the WWW server here at earth sciences. They can get more directly into MTNET by opening the URL: ftp://rock.esc.cam.ac.uk/pub/mtnet If you haven't already, I suggest you try this yourself using mosaic. -------------------------------------------------------------------------------- >>>10.9 Other news ================== >>>10.9.1 Electrode Comparison ============================== (submitted by Frederic Perrier) International Workshop on Geoelectrodes --------------------------------------- The first International Workshop on electrodes for the long term monitoring of the electrotelluric field took place in Garchy, France, from April 23 to April 29, 1995. Participants included representatives of groups working in Germany, United States, United Kingdom, Russia, Australia, Japan, Turkey and France. More than 95 electrodes designed for marine or land measurements were available for the experiment, with various types of designs, and based on Pb/PbCl2, Cu/CuSO4 and Ag/AgCl couples. During the first two days, self-potentials, internal resistance and temperature coefficients were measured in the laboratory. On April 26, the scientific issues of the campaign, the main problems, the design considerations and some results obtained in the field were presented by the participants. Proceedings of the oral presentations will be edited. During the remaining days of the workshop, 35 pairs of electrodes selected in each family were installed in the field at Garchy and the one-year monitoring of their potentials was started. Electrodes not installed in the field will be used for more laboratory measurements. Further information about the workshop can be obtained from the organisers : Gerard Clerc, Centre de Recherches Geophysiques, 58150 Garchy France Phone : 33-1-86691569 Fax : 33-1-86691033 Gilbert Petiau, Observatoire de Chambon-la-Foret, 45340 Chambon-la-Foret France Phone : 33-1-38322962 Fax : 33-1-38322023 Frederic Perrier, Laboratoire de Geophysique, BP12, 91680 Bruyeres-le-Chatel France Phone : 33-1-69266279 Fax : 33-1-69266049 E-Mail : PERRIER@LDG.BRUYERES.CEA.FR >>>10.9.2 LOTEM Group ===================== (submitted by Torsten Schoenfelder) The LOTEM - group of Cologne moved into new rooms, from Siebengebirgsallee to Godesberger Str. 10, 50968 Koeln. For mailing, please use the official university address: Institut fuer Geophysik und Meteorologie Universitaet zu Koeln Albertus Magnus Platz 50933 Koeln The new phone numbers: 470 - 5480 (Sekretariat) 470 - 5477 (A. Hoerdt) 470 - 5476 (A. Osman, L. Petrat, H. Thern, U. Fauzi) 470 - 5478 (S. Helwig, D. Sylvester) 470 - 5479 (G. Karlik, T. Hanstein, W. Parnadi, T.Schoenfelder, A. Donat) Faxnr. 470 - 5480 email addresses will change soon. >>>10.9.3 RRI News & How to Obtain RRI ====================================== (submitted by John Booker) Inv2d (RRI) NEWS John Booker, Sept 30, 1994. There is a bug in the implementation of frozen profiles (fictitious sites beneath which the model is held fixed at its starting value). This feature works properly ONLY if the frozen profile lies WITHIN the sites with actual data. Thus you cannot, at present, freeze the model outside of the data. This will be fixed in the next release. If this is a critical problem for anyone, I will explain how to fix it yourself. The paper: Rapid Two-Dimensional Inversion of COPROD2 Data, Wu, N, Booker, J.R. and Smith, J.T., J. Geomag. Geoelec., 45, 1073-1087, 1993. describes useful strategies for inverting for static shifts using inv2d. If you simply set all the shifts free, you are likely to converge to a local minimum of the object function in which the resistivity data are well-fit, but the phase data are ignored. The basic idea behind all strategies that we have found useful is to weight phase data more strongly until their misfit is small and then bring in the resistivity. ***NOTE*** This problem noted in last section can often be reduced by damping the inversion for static shifts (see new release notes below). ***NOTE*** The following comment CONTRADICTS a statement made in file READ_ME supplied with inv2d. When trying to fit TM mode data alone, experience has shown that varying the parameter that controls the depth-dependence of the norm ("eta") with iteration number can be very useful. For instance setting eta to 0.0 for the first iteration and letting it increase to 1.0 or 1.5 has the effect of forcing inv2d to fit the data with very shallow structure first and incorporating deeper structure only when shallow structure cannot do the job. A new release of inv2d is planned for early 1995. It will have significant advantages over the current version: a) Discontinuties at which the model smoothness condition is suspended can be declared anywhere in the model. This is very useful for incorporating geological information, such as independently determined depth to conductive or resistive basement, mapped faults, etc. b) Individual model nodes can be frozen at their starting value. This is again useful for incorporating a priori information or testing hypotheses. c) Inversion of static shift coefficients can be damped. This is useful when you want the statics to change only if the data cannot be fit without changing the statics. d) Pseudo (or virtual) sites can be declared. These are sites at which an inversion is performed, but there is no measured data. They allow model freedom between sites with data. Normally, the model will simply be smoothed into such a site from adjacent sites. However, sometimes model changes beneath a pseudo-site can improve data fit at other sites. With no pseudo-site, the routine which interpolates structure between data sites would not allow such structure to exist. e) Outputs surface magnetic and electric fields as well as MT data. f) Outputs file containing the fields inside the model. These can be used to restart the inversion for further iterations. They will greatly speed up the first iteration of the restart and in most cases, will permit using 32 bit rather than 64 bit arithmetic for the inversion. This will halve memory usage and substantially improve speed on many machines. g) Versions for 486, Pentium, PowerPC and Mac machines as well as Unix workstations. Features that are in testing. Some may make it into the next release. h) Inversion of vertical to horizontal magnetic field transfer function data (sometimes called "tipper" by those trying to confuse people). i) Surface topography. This will include both the air-earth interface and the seafloor. j) Semi-automatic mesh control. This will warn user that the mesh may be inaccurate and suggest appropriate modifications. k) Interface for GEOTOOLS-MT. How to get inv2d, the rapid 2D MT inversion program (commonly called RRI). use command: ftp gwiz.geophys.washington.edu -or- ftp 128.95.16.50 at login prompt type: anonymous at password prompt type: your last name or userid then type commands: cd pub/out/mt_inversion get README.FIRST mget Inv2d.news* bin <-- VERY IMPORTANT get inv2d.tar If you want the imagetool executable (see README.FIRST) get imagetool.Z finally, logout using bye You now need to unpack the Unix tar file inv2d.tar using the command tar -xf inv2d.tar This will set up directory structure. There are several readme files and a runme file that will get you started. Good Luck! John Booker -------------------------------------------------------------------------------- Alan G Jones Ottawa, June 6, 1995 -------------------------------------------------------------------------------- >>>Appendix: Email list ======================= IAGA Working Group I.2 Internet email list: 6 June 1995 -------------------------------------------------------- Changes noted since listing dated: 15 September 1994 Additions/corrections/deletions to: jones@cg.emr.ca Temporary addresses identified by termination date RETURNED after the address indicates that mail was returned from that address when last sent. I would appreciate receiving the correct email address. Toni Adam Sopron h3281ada@ella.hu Ashok Agarwal UVic numod@uvvm.uvic.ca Anand Kalvey UofA useralpl@mts.ucs.ualberta.ca B.R. Aurora IIG, Bombay bra@iigm0.ernet.in Dmitry Avdeev Troitsk avdeev@emsoft.msk.su <---NEW Karsten Bahr Potsdam kbahr@gfz-potsdam.de David Bailey Edinburgh dsbailey@glg.edinburgh.ac.uk <---NEW Dick Bailey UofT bailey@geophy.physics.utoronto.ca Roger Banks Edinburgh rbanks@glg.ed.ac.uk I.S. Barashkov Moscow baraskov@cs.msu.su Oliver Baumer Braunschweig oliver@geophys.nat.tu-bs.de Dave Beamish BGS k_dbe@vaxa.nerc-keyworth.ac.uk Roberto Benassi Geosystem gsy@geosystem.it <---NEW M.N. Berdichevsky Moscow dmitriev@cs.msu.su N.I. Berezina Moscow berezina@cs.msu.su Mel Best PGC mbest@gsc.emr.ca <---NEW Hugh Bibby IGNS, NZ srwghmb@m2g.gns.cri.nz Dave Boerner GSC boerner@cg.emr.ca John Booker UW booker@geophys.washington.edu Carla Braitenberg Trieste zadro@univ.trieste.it Heinrich Brasse FU Berlin hbrasse@fub46.zedat.fu-berlin.de Colin Brown Galway 0003067S@bodkin.ucg.ie Grant Caldwell IGNS, NZ srwgtgc@m2g.gns.cri.nz Wally Campbell USGS, Denver campbell@gldfs.cr.usgs.gov Vaclav Cerv GFU Prague vcv@seis.ig.cas.cz <---RETURNED F H Chamalaun Flinders mgfhc@cc.flinders.edu.au Alan Chave Woods Hole alan@faraday.whoi.edu J Chen UVic geocj321@uvvm.uvic.ca Arvidas B. Cheryauka U.I. GG&M cher@geophys.nsk.su Steve Constable Scripps sconstable@ucsd.edu Antonio Correia Evora correia@uevora.pt Jim Craven GSC craven@cg.emr.ca Jim Cull Monash jcull@artemis.earth.monash.edu.au Catherine deGroot-Hedlin UCSD cdh@wgasa.ucsd.edu Tatyana Demidova Shirshov demidova@statsc.msk.su V.I. Dmitriev Moscow dmitriev@cs.msu.su Al Duba LLNL alduba@llnl.gov Nigel Edwards U Toronto edwards@geophy.physics.utoronto.ca Gary Egbert Oregon State egbert@oce.orst.edu Markus Eisel GFZ Potsdam eisel@gfz-potsdam.de Rob Ellis UBC rob@geop.ubc.ca Rob Evans U Toronto evans@geophy.physics.utoronto.ca Mark Everett Texas everett@geopsun.tamu.edu <---CHANGED Hjalmar Eysteinsson Iceland he@os.is Eduard Fainberg Troitsk fain@emsoft.msk.su Colin Farquharson UBC farq@geop.ubc.ca Alicia Favetto Buenos Aires alicia@ezfesa.org.ar <---RETURNED N.V. Federov seva@mplik.e-burg.su Ian Ferguson UofM ferguso@wombat.geop.umanitoba.ca Jean Filloux Scripps jfilloux@ucsd.edu Gaston Fischer Switzerland fischer@on.unine.ch Carlos Flores-Luna Nice cflores@mimosa.unice.fr (-> ???) Agusta Flosadottir PMEL agusta@pmel.noaa.gov Sergio Fontes CNPq/ON sergio@obsn.on.br Mary Fowler Royal Holloway uhfb042@vax.rhbnc.ac.uk Bernhard Fluche Hannover fluche@gate1.bgr.d400.de Kiyoshi Fujita Kobe fuji-ta@icluna.kobe-u.ac.jp Nick Golubev Troitsk golubev@emsoft.msk.su Enrique Gomez-Trevino CICESE egomez@cicese.mx Ross Groom Toronto ross.groom@canrem.com Jagdish Gupta GSC gupta@cg.emr.ca Volker Haak GFZ Potsdam vhaak@gfz-potsdam.de John Haines IGNS, NZ haines@haines.gns.cri.nz Lynn Hastie U.Queensland hastie@kepler.physics.uq.oz.au Graham Heinson Tokyo heinson@ori.u-tokyo.ac.jp ->Sept 1995 R Hermanto Tasmania hermanto@geo.geol.utas.edu.au (R: Oct93) Lee Hirsch Exxon lmhirsc@custer.exxon.com Sven-Erik Hjelt Oulu seh@sveka.oulu.fi Bruce Hobbs Edinburgh bah@castle.ed.ac.uk A Hoerdt Cologne ad230@aix370.rrz.uni-koeln.de Y Honkura Tokio Inst Tech yhonkura@geo.titech.ac.jp Rosemary Hutton Edinburgh rhutton@glg.edinburgh.ac.uk Malcolm Ingham Wellington ingham@matai.vuw.ac.nz George Jiracek San Diego jiracek@moho.sdsu.edu Hartmut Joedicke Muenster jodicke@dmswwu1a.uni-muenster.de Alan Jones GSC jones@cg.emr.ca Walter Jones Edmonton wjones@terra.phys.ualberta.ca Andreas Junge Frankfurt junge@geo1.geophysik.uni-frankfurt.de << Pertti Kaikkonen U Oulu pertti.kaikkonen@oulu.fi <--CHANGED Richard Kellett UNB kellett@jupiter.sun.csd.unb.ca Toivo Korja U Oulu tkorja@sveka.oulu.fi Ron Kurtz GSC kurtz@cg.emr.ca Alexey Kuvshinov Troitsk akp@emsoft.msk.su Louis J. Lanzerotti Bell Labs ljl@physics.att.com Jim Larsen NOAA larsen@noaapmel.gov Marcela Lastovickova Prague ml@cspgig11 (BITNET) Lawrie Law PGC law@pgc.emr.ca Xiaobo Li Uppsala xiaobo@sgu.se <---CHANGED F E M (Ted) Lilley ANU ted.lilley@anu.edu.au Dean Livelybrooks Ecole dlivelyb@geo.polymtl.ca M.H.Loke ?? mhloke@cs.usm.my <---NEW Gabriella Losito Florence losito@dicnet.ing.unifi.it <---CHANGED Randy Mackie MIT randy@halley.mit.edu Ted Madden MIT trm@halley.mit.edu Adele Manzella Italy manzella@vm.cnuce.cnr.it Alex Marcuello Barcelona alex@natura.geo.ub.es Pierre Maregiano SDSU pmaregia@imagine.sdsu.edu Guy Marquis Strasbourgh marquis@rhodo.u-strasbg.fr <---NEW Marianne Mareschal Ecole marianne@geo.polymtl.ca Mario Martinez CICESE mmartinez@cicese.mx Willi Masero Neuchatel masero@on.unine.ch Hans-Martin Maurer Houston hmartin@awssun14.aws.waii.com<---CHANGED Kenneth MacDonald Edinburgh kenny@ed.ac.uk Dave McKirdy Strathclyde cabs17@ccsun.strath.ac.uk Gary McNeice Braunschweig 100121.1470@CompuServe.com <---NEW Maxwell Meju Leicester mxw@le.ac.uk Michel Menvielle Paris michel@planeto.geol.u-psud.fr Dennis Mills Geotools 71175.2513@CompuServe.com N.A. Mershikova Moscow mersikov@cs.msu.su Frank Morrison Berkeley hfmengeo@garnet.berkeley.edu Carlos Moyano Argentina cricyt@criba.edu.ar <---RETURNED Wolfgang Muller BGR, Hannover wolfgang.muller@gate1.bgr.dbp.de Darcy Nascimento Edinburgh darcy@glg.edinburgh.ac.uk Greg Newman Sandia ganewma@sandia.llnl.gov <---RETURNED Ed Nichols Berkeley edn@csem.lbl.gov David Nobes Canterbury d.nobes@csc.canterbury.ac.nz Yasuo Ogawa GSC-Ottawa oga@gsjrstn.gsj.go.jp <--CHANGED Doug Oldenburg UBC doug@geop.ubc.ca Gary Olhoeft Colorado golhoeft@moran.mines.colorado.edu <--NEW Nils Olsen Copenhagen nio@dmi.min.dk Arnold Orange 73321.3045@CompuServe.com Ana Osella Buenos Aires osella@dfuba.edu.ar Antonio Padilha INPE, Brazil padilha@das.inpe.br Nick Palshin Shirshov palshin@sio.msk.su Steve Park UC Riverside magneto@ucrmt.ucr.edu D. Patella Naples patella@dgvna.dgv.unina.it <---NEW Sudhir Kumar Paul Flinders mgskp@cc.flinders.edu.au Ken Paulson U Sask cybpsn@sask.usask.ca Laust Pedersen Uppsala lbp@geofys.uu.se Josef Pek GFU Prague jpk@seis.ig.cas.cz <---RETURNED Louise Pellerin USGS, Denver pellerin@musette.cr.usgs.gov M A Perez-Flores CICESE mperez@cicese.mx Alvaro Peretti Buenos Aires peretti@antar.org.ar Frederic Perrier Garchy perrier@ldg.bruyeres.cea.fr Christof Peter Goettingen cpeter@gwdgv1.dnet.gwdg.de Risto Pirjola FMI risto.pirjola@fmi.fi Jean-Paul Poirier IPG Paris poirier@ipgp.jussieu.fr Cristina Pomposiello Buenos Aires As for Ana Osella Anatoly Popov Irkutsk kozh@crust.irkutsk.su Jaume Pous Barecelona jaume@natura.geo.ub.es Carsten Pretzschner Freiburg pre@geophysik.geowiss.ba-freiberg.dbp.de Geoff Pritchard Cambridge geoff@esc.cam.ac.uk Wei Qian Aerodat wei@aerodat.com <---CHANGED Art Raiche CSIRO araiche@laurel.ocs.mq.edu.au C K Rao IIG kamesh@iigm0.ernet.in Thorkild Rasmussen Uppsala thorkild@sgu.se <---CHANGED Volker Rath Berlin volk1638@w413zrz.bg.tu-berlin.de Armin Rauen KTB rauen@ktb.bgr.d400.de C D Reddy IIG cdreddy@iigm0.ernet.in Luiz Rijo NCGG/UFPa rijo@npgp.ufpa.br Augustinho Rigoti Flinders mgar@cc.flinders.edu.au Oliver Ritter Edinburgh oritter@glg.ed.ac.uk Patricia Ritter Edinburgh pritter@glg.ed.ac.uk G F Risk IGNS srwggfr@m2g.gns.cri.nz Jeff Roberts Livermore jeff_roberts@esciqm.es.llnl.gov Roland Roberts Uppsala rr@geofys.uu.se J M Romo CICESE jromo@cicese.mx K K Roy Kharagpur kkroy@sys320.ernet.in Giovanni Santarato Italy v44@ifeuniv.unife.it Adam Schultz Cambridge adam@esc.cam.ac.uk Pierre Schnegg Neuchatel schnegg@on.unine.ch Gerhard Schwarz FU, Berlin schwarz@rz.uni-leipzig.de <---CHANGED Vladimir Semenov WDC-B2 sgc@adonis.ias.msk. Tom Shankland Los Alamos shanklan@seismo5.lanl.gov V. Shapiro Russia seva@mplik.e-burg.su Vitaly Shneyer Troitsk shneyer@emsoft.msk.su Fiona Simpson Imperial flsimp@gfz-potsdam.de Agata Siniscalchi Naples as Patella <---NEW Ramesh P Singh Kanpur ramesh@iitk.ernet.in Weerachai Siripunvaraporn Oregon State wsiripun@oce.orst.edu <---NEW Torquil Smith Cambridge torquil@esc.cam.ac.uk Brian Spies Schlumberger spies@ridgefield.sdr.slb.com Klaus Spitzer Hannover spitzer@gate1.bgr.d400.de Wilhelm Stiefelhagen Neuchatel Wilhelm.Stiefelhagen@chyn.unine.ch Johannes Stoll Frankfurt stoll@geophysik.uni-frankfurt.d400.de Kurt Strack Houston strack@igor.aws.waii.com Boris Svetov Troitsk svetov@emsoft.msk.su Lazlo Szarka Sopron h3007sza@ella.hu Shinich Takakura GSJ shin@gsj.go.jp Tamarchenko Houston ttamarch@awssun14.aws.waii.com <-CHANGED Pascal Tarits Brest tarits@catamaran-gw.univ-brest.fr Buelent Tezkan Koeln tezkan@geo.uni-koeln.de David Thomson Bell labs djt@research.att.com Hiroaki Toh U Tokio toh@ori.u-tokyo.ac.jp Carlos Torres-Verdin Schlumberger ctorres@sdr.slb.com Jandyr M. Travassos CNPq/ON jandyr@on.br Mustafa Kemal Tuncer Istanbul tuncer@hisar.cc.boun.edu.tr Jim Tyburczy Arizona State aojat@asuvm.inre.asu.edu Robert Tyler McGill rob@iemanja.meteo.mcgill.ca Andreas Tzanis Athens sggp01@grathun1 (BITNET) Toshi Uchida GSJ uch@gsj.go.jp Martyn J. Unsworth UW unsworth@geophys.washington.edu H Utada ERI, Tokyo utada@utada-sun.eri.u-tokyo.ac.jp M Uyeshima ERI, Tokyo uyeshima@utada-sun.eri.u-tokyo.ac.jp Leonid Vanyan Shirshov vanyan@sio.msk.su Ivan Varentsov Troitsk varents@emsoft.msk.su Panagiotis Varotsos Athens pvaro@leon.nrcps.ariadne-t.gr <---NEW Ari Viljanen FMI, Helsinki Ari.Viljanen@fmi.fi Keeva Vozoff Koeln ? Harve Waff U Oregon harve@waff.uoregon.edu******RETURNED**** Peter Walker Toronto same as Ross Groom B J Wanamaker U of Minn bwana@maroon.tc.umn.edu Phil Wannamaker UURI pewanna@uuri.utah.edu Don Watts GeoSystem gsy@geosystem.it <---NEW John Weaver UVic weaver@uvphys.phys.uvic.ca Peter Weidelt Braunsweig oliver@geophys.nat.tu-bs.de Kathy Whaler Edinburgh kathy.whaler@ed.ac.uk <---CHANGED Tony White Flinders mgaw@es.flinders.edu.au Andrew Wilson Edinburgh ajsw@ed.ac.uk Helmuth Winter KTB winter@ktb.bgr.d400.de Jim Wright MUN jim@convex.esd.mun.ca Wu, Nong UW nong@geophys.washington.edu Zonghou Xiong Utah zxiong@mgg6.crcamet.mq.edu.au<---CHANGED Yegorov Shirshov yegorov@sio.msk.suD Oya Yazici-Cakin Istanbul as Tuncer Chuck Young Michigan ctyoung@mtu.edu Gerhard Zacher Koeln zacher@track.geo.uni-koeln.de Annalisa Zaja Padova terra03@ipdunivx (BITNET) Andrea Zerilli AGIP andrea.zerilli@galactica.it Bob Zhamaletdinov Murmansk zham@ksc-gi.murmansk.su <---NEW Ping Zhang Ecole zhang@geo.polymtl.ca Mikhail Zhdanov Utah mzhdanov@mines.utah.edu Bension Zinger Houston bzinger@awssun14.aws.waii.com<---CHANGED Zhao Guoze SSB, Beijing yaxin.bi@nci.crn.cn Zhao Guoze SSB, Beijing /PN=MAP.MAIL/O=COMPANY/ADMD=CHINAMAILBJ/C=CN/@sprint.com GEOTOOLS 71175.2513@CompuServe.com Russian Geophysical Committee sgc@adonis.ias.msk.su Troitsk EM group igemr@emsoft.msk.su Shirshov Institute of Oceanology geoph@sio.msk.su