Working Group I.2 of IAGA - Electromagnetic Induction in the Earth ================================================================== Electronic Newsletter #8: August 1994 ------------------------------------- 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 (this one) This is the eighth 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 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: >>>1. Commercial use of Internet >>>2. Cambridge MT-DIW2 >>>3. Brest 1994 EM Induction Workshop >>>4. Boulder IUGG: 1995 >>>5. 13th EM workshop: Hokkaido - 1996 >>>6. MT-DIW3 >>>7. Other Future EM Meetings >>>7.1 Geomagnetism in Studies of the Earth's Interior: August, 1994 >>>7.2 Magnetic, electric & EM methods in seismology & volcanology: Sept. 1995 >>>7.3 3D EM: October 1995 >>>8. Classified Ads >>>Appendix: Email list Deadlines: OCTOBER 31 1994: Registration at Positano meeting (see #7.2) DECEMBER 25 1994: Submission of MT-DIW2 papers (see #2) FEBRUARY 1 1995: Submission of abstracts for Boulder (see #4) -------------------------------------------------------------------------------- >>>1. Commercial use of Internet ================================ Some of you have recently received a commercial solicitation through email from a company that sells MT software products. The company obtained our email addresses from somebody who gave them one of these newsletters. I cannot state just how annoyed I was by this solicitation, and expressed my anger to the company involved. The company has apologised, but in a manner which implied that they do not appreciate the seriousness of their action. I quote from their reply:- "I wish to apologize to Alan Jones and anyone else who was offended by the e-mail message I sent over the MTNET concerning commercial software. I was a bit reluctant to do this, knowing there was a risk of offending a few MTNET users..." Obviously, the company was able to overcome this reluctance, and did not mind offending some of us. It is a strict rule of Internet that it should not be used for commercial solicitations, otherwise we would all receive tens of junk-email messages a day. I gladly circulate our email addresses around the EM community in the hope that this will lead to better communication and also engender a spirit of co-operation, but I feel obligated to protect your addresses from unwanted commercial electronic mailing. So if you pass this newsletter on to a commercial concern, please make it clear that they are, under NO circumstances, to use the information for electronic solicitation. -------------------------------------------------------------------------------- >>>2. Cambridge MT-DIW2 ======================= The second MT data interpretation workshop (MT-DIW2) took place in Cambridge on 5th and 6th August. There were 37 participants to discuss the two new datasets - PNG and OKEMAP - plus some further discussion of the BC87 and COPROD2 datasets. The titles of the presentations were:- BC87 dataset: ------------- Alan Chave, Alan Jones and Torquil Smith Electric and magnetic field galvanic distorsion tensor decomposition: application to BC87 data Catherine deGroot-Hedlin Joint inversion for regional strike, decomposition elements, and resistivity structure, applied to the BC87 dataset Igor Feldman et al Analysis of BC87 data set Igor Feldman, Nick Golubev, Ivan Varentsov Experiments in 2D inversion of BC87 data Patricia and Oliver Ritter The BC87 Dataset: - GDS Transfer Functions with Magnetic Distortion, - Separartion of Local and Regional Information. - Some Thinsheet Model Studies. PNG dataset: ------------ Charley Swift and Bill Robinson (presented by Alan Jones) PNG dataset: background information, and Chevron's interpretations Ashok Agarwal and John Weaver Two-dimensional inversion of Papua New Guinea data using the `least-block' approach Markus Eisel The PNG data set: Relevance for an anisotropic layer in the upper crust? Nick Golubev, Ivan Varentsov Rough (without a priori knowledge) 2D inversion of PNG data Yoshi Honkura and Yasuo Ogawa On the number of blocks in 2-D resistivity modelling Ted Lilley A critique of the MTDIW2-PNG data set on the basis of Mohr circles Dean Livelybrooks Two-dimensional inversion of the Papua New Guinea MT data set using impedance decomposition-derived weighting and POCS-guided gridding Randy Mackie Another look at PNG - constraints from MT Yasuo Ogawa An adaptive method to remove static shift Jaume Pous, Juanjo Ledo and Alex Marcuello Two-dimensional model for the PNG MT data Clark Scott and George Jiracek Two-dimensional distortion analysis, topographic response, and modelling of PNG MT data Fiona Simpson Groom-Bailey decomposition of the PNG data set: Analysis and modelling of the decomposed tensors Hiroaki Toh and Makoto Uyeshima Two-dimensional model study of the PNG Dataset Toshi Uchida Two-dimensional inversion of the Papua New Guinea magnetotelluric data with smoothness constraint OKEMAP dataset: --------------- John Booker RRI inversion of OKEMAP dataset Alan Jones Wavenumber-domain analysis of the OKEMAP dataset Ulrich Schmucker Modelling with linearized integral equations in B-polarization Toshi Uchida Two-dimensional inversion of the Oklahoma EMAP magnetotelluric data with smoothness constraint COPROD2 dataset: Poster presentations ------------------------------------- Ashok Agarwal, K.J. MacDonald and John Weaver Can the COPROD2 dataset resolve the resistive breaks between isolated conductive bodies? Nataly Baglaenko, Nick Golubev, Ivan Varentsov Inversion of COPROD2 data in the 2D model with fixed geometry Jaume Pous, Juanjo Ledo and Alex Marcuello Interpretation of the COPROD2R MT data Many of the authors had expanded abstracts of their work for distribution. If you are interested in any of the above papers, please contact the authors involved and request a copy of their abstract. As with MT-DIW1, a special publication of JGG is planned. Submission deadline is DECEMBER 25TH 1994. Submission of a paper is NOT limited to those who attended the MT-DIW2, but is open to all who have analyzed one of the above datasets. Submission of the text in LaTeX is required, and the figures in PostScript is highly desired. This will speed up the editing and publishing process and ensure that we get the special issue out by Autumn, 1995. Please contact me for further details. -------------------------------------------------------------------------------- >>>3. Brest 1994 EM Induction Workshop ====================================== As most of you were at Brest, I will say little about it except that it was a stunning success thanks to the efforts of Pascal Tarits and his Local Organizing Committee. Over 250 participants attended to listen to, or read, 253 oral and poster presentations. The cultural highlight was the meal in the castle. Wonderful. There were too many scientific highlights to mention. The abstracts will soon be available on MTNET for those who wish to obtain them electronically. -------------------------------------------------------------------------------- >>>4. Boulder IUGG: 1995 ======================== Here is a list of the EM-related sessions for Boulder IUGG (July 2 - 14, 1995) that I received from Sven Hjelt, Chairman of IAGA Division I. Remember that the abstract deadline is:- FEBRUARY 1ST 1995 It is possible to email your abstract to the AGU. I will include details of the abstract format in the next newsletter. JS 102 Relating geophysical measurements to lithospheric processes through continental drilling. Volker Haak, GeoForschungsZentrum Potsdam, Telegrafenberg, D- 14407 Potsdam, (GERMANY) e-mail: vhaak@gfz-potsdam.de) fax: + 49 - 331 - 288 - 1235 J Erzinger (GERMANY); J Mutter (USA); D R Schmitt (CANADA) Multidisciplinary experiments in the vicinity and within deep boreholes, and laboratory studies of fresh core samples, can provide insights of local problems useful in a more general understanding of the formation of the continental crust. JS 103 Styructure, evolution and dynamics of the core-mantle boundary region. (also listed with IASPEI: AS1) R Jeanloz, Department of Geology and Geophysics, University of California, Berkeley, CA 94720 (USA) e-mail: jeanloz@uclink.berkeley.edu fax: +1 415 643 9980 Kathy Whaler (UK); B Bugget (CANADA) All aspects of the core-mantle boundary region and associated interactions. Geomagnetic, seismological, geodynamic and high pressure studies giving complementary information on the nature, thickness, composition and influence of the D" layer. JS107 Lithospheric anisotropy: observations and interpretation. (Also listed with IASPEI:AS16) Marianne Mareschal, Genie mineral, CP 6079, succ Centre Ville, Montreal, H3C 3A7 (CANADA) e-mail: marianne@geo.polymt1.ca fax: + 1 - 514 - 340 4191 Michael Bostock (CANADA) Electrical or seismic upper mantle anisotropy, and also crustal anisotropy. Interpretation of data and possible constraints on the source or sources of anisotropy. JS108. Geophysical signatures of modern and ancient continental margins. (also listed with IASPEI: AS17) John R Booker, Geophysics AK50, Univ. of Washington, Seattle WA 98195 (USA) e-mail: booker@geophys.washington.edu fax: + 1 - 206 - 543 - 0489 M Christina Pomposiello (ARGENTINA) Focus on modern and ancient continental margins with a spectrum of techniques (seismology, electromagnetic induction, palaeomagnetism, geodesy, geochemistry, geology etc.). Emphasis on the synergistic value of multiple approaches to a problem. JS109. Patterns in the Earth's structure and dynamics: Observations, Earth models, and laboratory measurements. (also listed with IASPEI: AS12) Steven Constable, Institute of Geophysics and Planetary Phyiscs, La Jolla, CA 92093-0225 (USA) e-mail: sconstable@igppqm.uscd.edu fax: + 1 619 534 8090 Alfred G Duba (USA); J P Poirier (FRANCE); I Jackson (AUSTRALIA) Modelling field observations relevant to the Earth's internal physical structure which are also compatible with current laboratory measurements. Also papers showing contradictions between current models, data, and laboratory studies, which therefore indicate a need for further work. S110 Multidimensional mathematical advances in electromagnetic induction: decomposition, modelling and inversion. E Gomez-Trevino, CICESE, Geofisica, POB 434 843, San Diego CA 92143-4843 (USA) e-mail: egomez@cicese.mx fax: 1 - 706 - 674 4502 T Smith (UK) All aspects of theoretical and practical development in electromagnetic modelling and inversion, especially the application of new methods to real data sets. IS111+216+508 Multidimensional currents over multidimensional Earth structures: theory and observations. A G Jones, Geological Survey of Canada, 1 Observatory Crescent, Ottawa, Ontario, K1A 0Y3 (CANADA) e-mail: jones@cg.emr.ca fax: + 1 - 613 - 992 8836 A D. Richmond (USA); E W Mbipom (NIGERIA) Theoretical and observational studies treating both external currents and Earth conductivity as spatially structured; the influence on the characteristics of geomagnetic variations at diurnal periods and less. S112 Electromagnetic studies of the solid Earth. Steven Constable, Scripps Institute of Oceanography, La Jolla, CA 92093-0225 (USA) e-mail: sconstable@igppqm.uscd.edu fax: + 1 619 534 8090 S I Fontes (BRAZIL) X R Kong (CHINA) Papers on electromagnetic studies which do not fit in with other sessions, specially those on field, laboratory and theoretical studies of EM induction and electrical conductivity in the Earth and earth materials. -------------------------------------------------------------------------------- >>>5. 13th EM workshop: Hokkaido - 1996 ======================================= The 13th Workshop on Electromagnetic Induction in the Earth will be held in 1996 on the Japanese island of Hokkaido. The Japanese hosts will be led by Prof. Yoshi Honkura. Below is a brief outline of the proposal from Honkura:- ************************************************************************** Location The Onuma International Seminar House, Nanae-cho Town, Hokkaido, Japan This seminar house is located in a quasi national park in southern Hokkaido, which is the northern-most island. Date July 10 - 17, 1996 Registration fees 15,000 yen ($150) 5,000 yen ($50) .... students Accommodation costs Hotel package ......... 10,000 yen ($100) per day per person (Room, breakfast, lunch, dinner) Public accommodation ... 6,000 yen ($60) per day per person (Room, breakfast, dinner) Youth hostel ........... 4,500 yen ($45) per day per person (Room, breakfast, dinner) Potential sources of additional financial support We plan to apply for a grant-in-aid for an international conference of the Ministry of Education, Science and Culture of Japan. We will also request some societies to support the workshop. We will search for a few more sources of financial support. Possible tour for the workshop excursion (1) The geothermal power station located a few tens of kilometers to the north. (2) The Usu and Showa-shinzan volcanoes located about 100 km to the north. (3) The nearby volcanoes, Komagatake and Esan. Other pertinent information (1) There are a few lakes in the town and fishing is possible. (2) There are 47 tennis courts and 5 golf courses. (3) There are many paths meandering through forests. (4) Camping is possible. (5) A welcome party will be planned by the town inhabitants. (6) An EM relay race may be planned with participation of workshop participants and local inhabitants. There is a course around the biggest lake. (7) Access to the town is easy. International flights are connected to domestic ones at the Osaka International Airport which will soon be open. It takes about one hour by bus from the local Hakodate airport. ************************************************************************** -------------------------------------------------------------------------------- >>>6. MT-DIW3 ============= All participants at the MT-DIW2 were unanimous in their wish for a 3rd MT data interpretation workshop. After discussion with the Japanese, it has been agreed that the Geological Survey of Japan (Yasuo Ogawa and Toshi Uchida) will host the MT-DIW3 prior to the Hokkaido EM workshop. We will take on two new datasets for this workshop. One will hopefully be a 100 MT-site set on a 10 km x 10 km grid, with 1 km between each site, over a geothermal prospect. We are seeking a second dataset, and would like to again have one from the petroleum industry if possible. Those of you with contacts in the industry please try to find one that is (a) current, (b) with a problem that MT can solve, and (c) in the "public domain" so that we can publish our results. -------------------------------------------------------------------------------- >>>7. Other Future EM Meetings ============================== >>>7.1 Geomagnetism in Studies of the Earth's Interior: August, 1994 ==================================================================== A meeting on Geomagnetism in Studies of the Earth's Interior, to be held on August 22-26, 1994 in Pune, India Abstracts are solicited for presentations on the interpretation of static and time varying geomagnetic phenomena observed in satellite, aeromagnetic and marine studies and in records from geomagnetic observatories, and on related geophysical subjects. For more information, please see the 7th electronic newsletter, or contact Jim Heirtzler on jamesh@ltpsun.gsfc.nasa.gov. >>>7.2 Magnetic, electric & EM methods in seismology & volcanology: Sept. 1995 ============================================================================== An international workshop will be held in Positano, Italy, on September 20-22, 1995, on the topic "Magnetic, electric & EM methods in seismology & volcanology". The workshop themes are:- Methodological developments in: - Self potantial - Geomagnetism - Direct Current Geoelectrics - Frequency-domain and time-domain EM - MT Application to: - Seismogenetic structures - Active volcanoes - Precursory Phenomena - Earthquake and volcanic eruption prediction If you wish to register for this workshop, or require more information, contact ROSA DI MAIO Department of Geophysics and Volcanology University "Federico II" Largo S, Marcellino, 10 I-80138 Naples ITALY tel: +39 - 81 - 5516-161 or -166 or -200 fax: +39 - 81 - 5527-631 You are requested to register by OCTOBER 31st 1994. >>>7.3 3D EM: October 1995 ========================== An International Symposium on Three-Dimensional Electromagnetics 3D EM) is being planned for October, 1995, at Schlumberger-Doll Research in Ridgefield, Connecticut. The symposium will cover modern methods in the measurement, computation, and inversion of 3D EM fields. For more details, please see the 7th electronic newsletter, or contact Mike Oristaglio at:- e-mail: oristaglio@ridgefield.sdr.slb.com phone: (203) 431 - 5566 Schlumberger-Doll Research Old Quarry Road Ridgefield, CT 06877-4108 USA FAX: (203) 438 - 3819 -------------------------------------------------------------------------------- >>>8. Classified Ads ==================== (Submitted by Doug Oldenburg) Wanted: Computer Programmer and Environmental Geophysicist UBC-Geophysical Inversion Facility, Dept. of Geophysics and Astronomy UBC, Vancouver, B.C. Job Description: A full-time permanent position is available starting September 15, 1994. The successful applicant will carry out work in two areas. In Area I, duties include upgrading of existing geophysical software, writing documentation, distributing licensed software to companies and interacting with companies to isolate problems and to identify needed upgrades to the software. Duties in Area II will be research oriented and focus upon the application of geophysical inversion software to solve environmental, geotechnical, and exploration problems. The applicant must have good organizational skills, a solid background in Unix workstations and PC's, Fortran programming, and computer software development. The ideal candidate should have theoretical background in physics, mathematics, numerical analysis and geophysics and have an M.Sc. degree, preferrably in Geophysics. Applicants with a Ph.D. are not excluded. Good communication and personal interaction skills are essential as the applicant will be working with a group of 4 research scientists and will also be interacting with personnel from eleven mining companies and numerous geophysical contracting and engineering/geotechnical companies. Applicants can contact: Doug Oldenburg UBC-Geophysical Inversion Facility Dept. of Geophysics and Astronomy University of British Columbia Vancouver, B.C., V6T 1Z4 ph: 604--822--5406 fax: 604--822-6047 email: doug@geop.ubc.ca -------------------------------------------------------------------------------- Alan G Jones Ottawa, August, 1994 -------------------------------------------------------------------------------- >>>Appendix: Email list ======================= IAGA Working Group I.2 Internet email list: 19 August 1994 ----------------------------------------------------------- Changes noted since listing dated: 20 June 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 Karsten Bahr Potsdam kbahr@gfz-potsdam.de 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 M.N. Berdichevsky Moscow dmitriev@cs.msu.su N.I. Berezina Moscow berezina@cs.msu.su Hugh Bibby IGNS, NZ srwghmb@m2g.gns.cri.nz Dave Boerner GSC boerner@cg.emr.ca John Booker UW booker@geophys.washington.edu 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 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 <---CHANGED Steve Constable Scripps sconstable@ucsd.edu Antonio Correia Evora correia@uevora.pt Jim Craven GSC craven@cg.emr.ca Jim Cull Monash esc163f@vaxc.cc.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 Cambridge everett@esc.cam.ac.uk <---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 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 Queen's U ross.groom@canrem.com <---CHANGED 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 Flinders mggsh@es.flinders.edu.au 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 Edinburgh ajunge@glg.ed.ac.uk Pertti Kaikkonen U Oulu geof-pjk@finou.oulu.fi 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 xl@geofys.uu.se F E M (Ted) Lilley ANU ted.lilley@anu.edu.au Dean Livelybrooks Ecole dlivelyb@geo.polymtl.ca Gabriella Losito Florence losito@ingfi1.ing.unifi.it 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 Marianne Mareschal Ecole marianne@geo.polymtl.ca Mario Martinez CICESE mmartinez@cicese.mx Willi Masero Neuchatel masero@on.unine.ch Hans-Martin Maurer Uppsala hmm@geofys.uu.se Kenneth MacDonald Edinburgh kenny@ed.ac.uk Dave McKirdy McMaster mckirdy@mcmail.cis.mcmaster.c Maxwell Meju Leicester mxw@le.ac.uk Michel Menvielle Paris michel@geophy.lps.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 Wolfgang Muller BGR, Hannover wolfgang.muller@gate1.bgr.dbp.de Greg Newman Sandia ganewma@sandia.llnl.gov Ed Nichols Berkeley edn@csem.lbl.gov David Nobes Canterbury d.nobes@csc.canterbury.ac.nz Yasuo Ogawa GSC-Ottawa ogawa@cg.emr.ca (-> April 1995) Doug Oldenburg UBC doug@geop.ubc.ca 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 <---CHANGED Steve Park UC Riverside magneto@ucrmt.ucr.edu Sudhir Kumar Paul Flinders mgskp@cc.flinders.edu.au <--RETURNED Ken Paulson U Sask cybpsn@sask.usask.ca Laust Pedersen Uppsala lbp@geofys.uu.se Josef Pek GFU Prague jpk@seis.ig.cas.cz 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 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 <---NEW Carsten Pretzschner Freiburg pre@geophysik.geowiss.ba-freiberg.dbp.de Geoff Pritchard Cambridge geoff@esc.cam.ac.uk <---CHANGED Wei Qian GSC-Ottawa wq@cg.emr.ca Art Raiche CSIRO araiche@laurel.ocs.mq.edu.au C K Rao IIG kamesh@iigm0.ernet.in Thorkild Rasmussen Uppsala tr@geofys.uu.se 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 <---CHANGED Pierre Schnegg Neuchatel schnegg@on.unine.ch Gerhard Schwarz FU, Berlin ggsch@fub46.zedat.fu-berlin.de 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 <---CHANGED Ramesh P Singh Kanpur ramesh@iitk.ernet.in Russian Geophys. Comm. Moscow sgc@node.ias.msk.su 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 <---CHANGED 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 <---CHANGED Tamarchenko Atlas Wireline ttamarch@smtplink.aws.waii.com 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@eg426.berkeley.edu <---CORRECTED Jim Tyburczy Arizona State aojat@asuvm.inre.asu.edu 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 <---CHANGED Ivan Varentsov Troitsk varents@emsoft.msk.su Ari Viljanen FMI, Helsinki Ari.Viljanen@fmi.fi <---NEW Keeva Vozoff Koeln ? Harve Waff U Oregon harve@waff.uoregon.edu Peter Walker Queen's U same as Ross Groom <---CHANGED B J Wannamaker U of Minn bwana@maroon.tc.umn.edu Phil Wannamaker UURI pewanna@uuri.utah.edu John Weaver UVic weaver@uvphys.phys.uvic.ca Peter Weidelt Braunsweig oliver@geophys.nat.tu-bs.de Kathy Whaler Leeds kathy@earth.leeds.ac.uk 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@mines.utah.edu Yegorov Shirshov yegorov@sio.msk.su <---CHANGED Chuck Young Michigan ctyoung@mtu.edu Gerhard Zacher Koeln zacher@track.geo.uni-koeln.de <---NEW Annalisa Zaja Padova terra03@ipdunivx (BITNET) Andrea Zerilli AGIP andrea.zerilli@galactica.it Ping Zhang Ecole zhang@geo.polymtl.ca Mikhail Zhdanov Utah mzhdanov@mines.utah.edu Bension Zinger Atlas Wireline bzinger@smtplink.aws.waii.com 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 <---CHANGED