Working Group I.2 of IAGA - Electromagnetic Induction in the Earth ================================================================== Electronic Newsletter #7: June 1994 ------------------------------------ Previous newsletters: enews.Oct92 - 1st enews.Jan93 - 2nd enews.Feb93 - 3rd enews.Oct93 - 4th enews.Feb94 - 5th enews.Mar94 - 6th enews.Jun94 - 7th (this one) This is the seventh 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. ***************** *** DEADLINES *** ***************** JUNE 1: Review papers for Brest JUNE 2: Remaining registration costs for MT-DIW2 JULY 28: Expanded abstracts for MT-DIW2 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. Brest 1994 EM Induction Workshop >>>2. MT-DIW2 >>>3. Soviet Books >>>4. Meeting Announcements >>>4.1 3D EM: October 1995 >>>4.2 Geomagnetism in Studies of the Earth's Interior: August, 1994 >>>Appendix: Email list -------------------------------------------------------------------------------- >>>1. Brest 1994 EM Induction Workshop ====================================== There has been a tremendous response to the Call for Papers for the Brest meeting. Over 250 abstracts have been submitted. It should make for an excellent workshop. The Program Committee want to ensure that Brest will be a real "workshop", with a strong spirit of communication and a lot of time for discussion. Accordingly, the format that we propose to adopt will be close to the one that was so successful at Ensenada. In general terms, the mornings will be for oral presentations. The afternoons will be for attending the poster presentations, which will be followed by an hour of discussion. Finally, on Tuesday and Thursday we will return to the posters for the wine and cheese. Note that all posters will be up for the whole meeting, but that the focus on any particular afternoon is the posters for the session(s) of that morning. In addition, all oral presenters have the opportunity - which we strongly encourage - to have their material in poster form in addition to the oral presentation. Due to the limited time available for oral presentations, and our commitment as a community NOT to go to simultaneous sessions, we can only have 1/4 - 1/3 of the submitted abstracts given orally. The Program Committee will choose which presentations are to be given as orals, and which as posters. Please understand if you had requested an oral presentation, but are asked to give a poster presentation instead. If you make a good poster, you will be far more effective at presenting your work than the 12 minutes allotted for oral presentation. The 12 minutes maximum for oral presentations will be STRICTLY adhered to in order to leave 3 minutes for discussion. There are NO exceptions! We want to engender a real spirit of "work" in our workshop. Make sure that you practise your talk before you come, preferably to your colleagues at your institute. Even the best of us can have our oral presentations improved by seeking constructive criticism prior to the workshop. The best advice I ever heard for oral presentations was 1: Tell them what you are going to tell them (1 min) 2: Tell them (10 mins) 3: Tell them what you told them (1 min) This means give a 1 minute overview of your talk. Give your talk in ten minutes. Give a 1 minute review of the main points. And in 12 minutes you will not leave the audience with more than 2 or 3 points - so please do not try to give your magnus opus. Bring along one-page handouts of the main points to give to interested people after your talk. If you had requested an oral presentation but now wish to give a poster, please contact Pascal Tarits immediately. -------------------------------------------------------------------------------- >>>2. MT-DIW2 ============= Everything is on schedule for the MT-DIW2. Some latest information. BC87 dataset: ------------- For some reason, the EDI files in mtnet for the BC87 dataset did not contain the data from all sites (thanks Patricia Ritter for pointing this out). If you wish to work with these data and uploaded either of the two EDI files (bc87.edi.Z or bc87.zip), please upload them again. The file sizes etc. are now:- 392 -rw-rw-r-- 1 jones cgd 386036 Jun 13 13:49 bc87.edi.Z 384 -rw-rw-r-- 1 jones cgd 380018 Jun 13 14:04 bc87.zip (Note: as of June 20th only the north american node of mtnet has these updated files) Papua New Guinea dataset: ------------------------- The two models to explain the data proposed by J. Hebberger of Chevron (Australia) have now been scanned and can be uploaded in compressed PostScript format. They are:- 88 -rw-r--r-- 1 jones cgd 89435 Jun 14 15:29 modA.PS.Z 89 -rw-r--r-- 1 jones cgd 90537 Jun 14 15:29 modB.PS.Z (Note: as of June 20th only the north american node of mtnet has these files) Posters: (repeat) ----------------- Anyone who is unable to attend the MT-DIW2, but who works on one of the three main datasets or the COPROD2 set, can send a poster of their results to Adam Schultz. These posters will be displayed for the duration of the MT-DIW2. If there is time in the program, a brief synopsis of the main results will be orally presented by one of the participants. Publication: (repeat) --------------------- It is my understanding that JGG are very happy with the special publication that came out, and are prepared to offer their journal again for the MT-DIW2. As with the MT-DIW1, submission of manuscripts and diagrams is preferentially by email, and the text must be in TeX or LaTeX using the JGG style files. Submission of a paper for this issue is for all who have something to say about one of the designated datasets - it is not restricted to attendees only. -------------------------------------------------------------------------------- >>>3. Soviet Books ================== (Submitted by Ivan Varentsov) EMRC,P.O Box 57,Moscow B-218,117218,Russia Phone: (095)334-09-17 Fax: (095)292-65-11 GEO Box 484 E-mail: fain @ emsoft. msk. Su Dear Colleague! Electromagnetic Research Centre publish both original works and scientific reviews in English under general title "Advanced Geophysics. Russian Experience." Two books of these series have already been issued. The first of them is the book "Information Theory Basis of Geophysics " by Professor B.S.Svetov. In this original work the author provides the grounding for information theory and its methods application in geophysics. The author's main aim is to show that C.Shannon's encoding theorems may be utilized with the view of achieving higher efficiency of geophysical investigations. On the other hand, the author attracts the attention of specialists in geophysics to scientific significance of these theorems, which may be regarded as direct continuation of those concerning existence and uniqueness of solution of inverse geophysical problems. In addition, the author dwells on a number of specific applications of information theory in geophysics such as quantitative estimate of information possibilities of geophysical data acquisition and processing systems, information estimate of experimental results, determination of information connection between heterogeneous geophysical data and so on. The second issue of this series is the book "Statistical Processing of Geophysical Data" by Professor A.A.Nikitin. This book contains the description of different techniques of statistical data processing necessary for the solution of two basic problems: field separation and weak signal detection in the presence of noise. For the solution of the first of these problems, the application of the main component analysis, of compensation Wiener-filter and of adaptive two dimensional energy filteing is suggested. The weak signals detection is achieved on the basis of the theory of statistical decisions and multidimensional variance analysis. Besides, the potentialities of new technique of integrated field classification, with and without training, for multilevel data processing and interpretation are investigated. These books may be useful for all those involved in different branches of geophysics, for research and exploration geophysists, for scientists as well as students. Please address your orders to Nick Scarr,Westlink, 2 Blakes Ware Manor,Warefside,Hertfordshire UK SG12 7RD, and make money remittance in the amount of $20 including shipping charges for each book. In the nearest future the next issues of this series, will be published, in particular: prof. G.A.Sobolev "Fundamental of Earthquake Prediction." prof. F.M.Kamenetsky "Transient Electromagnetics in Exploration", prof. V.I.Dmitriev "Inverse Problems of Geophysics" E M R C President Prof. E.B.Fainberg Order form. Please send the following book(s): B.S.Svetov Information Theory Basis of Geophysics copies A.A.Nikitin Statistical Processing of Geophysical Data copies Enclosed please find Eurocheque Postal cheque Personal cheque for the sum of Bank draft International money order UNESCO coupons Name Address Postal/Zip Code -------------------------------------------------------------------------------- >>>4. Meeting Announcements =========================== >>>4.1 3D EM: October 1995 ========================== (Submitted by Michael Oristaglio) ************************************** * International Symposium on * * THREE-DIMENSIONAL ELECTROMAGNETICS * * Preliminary Announcement * ************************************** 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. The emphasis will be on applications in electrical geophysics (diffusive EM fields) for resource exploration, environmental and cru- stal studies, but contributions will also be welcome from related areas such as biomedical imaging or non-destructive testing and evaluation. The symposium will honor the late Gerald W. Hohmann's fundamental contributions to 3D EM. Proceeds from the symposium will be donated to the G. W. Hohmann Memorial Trust for Teaching and Research in Applied Electrical Geophysics to fund an annual award in Jerry's name. This e-mail is being sent to determine your interest in the sym- posium and to solicit your ideas on its content and organization. If you are interested in attending or contributing, and would like to receive further information, please respond by return e-mail or by contacting one of the organizers (see below). A draft of the format and suggested themes for the symposium is given below. Your comments are welcome on all aspects: content, tim- ing, or even location. The official first announcement of the sympo- sium will be sent by August 15. Please forward this e-mail (or give a printed copy) to anyone you think may be interested. GENERAL INFORMATION Schlumberger-Doll Research (SDR) is a research center of about 150 people operated by Schlumberger's Oilfield Services division. It is located in Ridgefield, Connecticut, a small New England town approximately 50 miles north of New York City and 5 miles south of Danbury, Connecticut. It is easily reached through the NY area air- ports, LaGuardia, JFK, and Newark (approx. 1 hr 15 min drive to each); Stewart Airport in Newburgh, New York (approx. 50 min); or Bradley Airport in Hartford, Connecticut (approx. 1 hr 15 min). Accomodations are available in several small inns in Ridgefield and surrounding towns, and hotels in the Danbury area. * PRELIMINARY ANNOUNCEMENT * THREE-DIMENSIONAL ELECTROMAGNETICS (3D/EM) - A Memorial Symposium for Jerry Hohmann - DATE October 4-6, 1995 (the week before the 1995 SEG Meeting) LOCATION Schlumberger-Doll Research, Ridgefield, Connecticut, USA REGISTRATION $400 (includes lunches, a Symposium dinner, and Proceedings) * Proceeds will be donated to the * G. W. Hohmann Memorial Trust for * Teaching and Research in Applied Electrical Geophysics ORGANIZERS Michael Oristaglio e-mail: oristaglio@ridgefield.sdr.slb.com phone: (203) 431 - 5566 Brian Spies e-mail: spies@ridgefield.sdr.slb.com phone: (203) 431 - 5569 Schlumberger-Doll Research Old Quarry Road Ridgefield, CT 06877-4108 USA FAX: (203) 438 - 3819 FORMAT Sessions on 3D EM Modeling / Inversion / Practice. Each session will include 3 invited papers, (approx.) 6 contributed papers, and roundtable discussion. Below are suggested themes, topics, and questions to be answered for each session. >> 3D EM MODELLING: "Still crazy after all these years?" << * Newkids-on-the-Block (staggered f-d, edge f-e, SLDM, ...) vs The Establishment (integral equations) * Where are the checks on accuracy and benchmark models? * Now that 3D is easy, what about anisotropy? >> 3D EM INVERSION: "I had a dream" << * Why aren't 1D, 2D or 2.5D inversions good enough? * When does imaging mean inversion and vice versa? * Promise them anything, but give them a Born approximation. >> 3D EM PRACTICE: "3D EM fields in the field" << * Why talk about 3D, when we never measure 3D? * EM resolution is bad enough in 1D, why worry about 3D? * When does 3D make a difference? (Examples, please!) >>>4.2 Geomagnetism in Studies of the Earth's Interior: August, 1994 ==================================================================== (Submitted to GPmag by Jim Heirtzler) "Geomagnetism in Studies of the Earth's Interior" August 22-26, 1994 Pune, India Co-Sponsored by the Indian Institute of Geomagnetism (IIG), the National Science Foundation (NSF) and the National Aeronautics and Space Administration (NASA) 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. There will be geographic emphasis on the general region of the Indian subcontinent, but other areas may be included. Contributed presentations will be 15 minutes. These should be submitted in the usual AGU format (max size to fit a 11.8 X 18 cm space) simultaneously to each of the three convenors: (1) Mita Rajaram, Indian Institute of Geomagnetism, Colaba, Bombay, 400005 INDIA, fax: 091-22-2189568, e-mail: mita@iigm0.ernet.in (2) Steven Cande, Scripps Institute of Oceanography, MC 0215, La Jolla, CA 92093, fax: 619-534-8653-346, e-mail: cande@gauss.ucsd.edu and (3) Jim Heirtzler, NASA/GSFC Code 920, Greenbelt, MD, 20771, fax: 301-286-1757, e-mail: jamesh@ltpsun.gsfc.nasa.gov. Deadline for submissions is June 15, 1994, with acceptance notices issued shortly thereafter. Be sure to include e-mail address if that is available. There is no registration fee. Housing and travel information will be sent to those submitting abstracts. Pune is about 125 km southeast of Bombay. There will be informative presentations by representatives of several Indian institutions working in geomagnetism. For more information, please contact Jim Heirtzler on jamesh@ltpsun.gsfc.nasa.gov. -------------------------------------------------------------------------------- Alan G Jones Ottawa, June, 1994 -------------------------------------------------------------------------------- >>>Appendix: Email list ======================= IAGA Working Group I.2 Internet email list: 20 June 1994 --------------------------------------------------------- Changes noted since listing dated: 22 March 1994 Additions/corrections/deletions to: jones@cg.emr.ca Temporary addresses identified by termination date An "R" after the address indicates that mail was returned from that address when last sent. The month/year gives the returned date. 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 vitaly@uiggm.nsk.su 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 <---NEW 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@itg.esc.cam.ac.uk 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 groom@geol.queensu.ca 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 <---CHANGED 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 <--CHANGED 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 Palsin Shirshov leo@diorit.msk.su Steve Park UC Riverside magneto@ucrmt.ucr.edu 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 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 Carsten Pretzschner Freiburg pre@geophysik.geowiss.ba-freiberg.dbp.de Geoff Pritchard Cambridge geoff@itg.esc.cam.ac.uk 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@itg.esc.cam.ac.uk 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 f.simpson@imperial.ac.uk 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 eisel@geophysik.uni-frankfurt.de Kurt Strack Houston strack@igor.aws.waii.com Boris Svetov Troitsk svetov@emsoft.msk.su Lazlo Szarka Sopron h3007sza@ella.hu Shinich Takakura NOC, Japan shin@gpsun2.jnoc.go.jp 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 Berkeley ??????? 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 leo@diorit.msk.su ALSO sgc@node.ias.msk.su Ivan Varentsov Troitsk varents@emsoft.msk.su Keeva Vozoff Koeln ? Harve Waff U Oregon harve@waff.uoregon.edu Peter Walker Queen's U walker@geol.queensu.ca B J Wannamaker U of Minn bwana@maroon.tc.umn.edu Phil Wannamaker UURI pewanna@uuri.utah.edu <---CHANGED 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 Chuck Young Michigan ctyoung@mtu.edu 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 demidova@statsc.msk.su <---NEW