Working Group I.2 of IAGA - Electromagnetic Induction in the Earth ================================================================== Electronic Newsletter #2: January 1993 -------------------------------------- This is the second electronic newsletter for our group. A newsletter will be sent around when there is enough material to warrant distrobution. Not all of us in the working group have 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). Please submit any comments/articles/news-items/gossip/corrections to myself at jones@cg.emr.ca .................... . HAPPY NEW YEAR . .................... 1. IAGA News ============ The latest IAGA News (September 1992, No. 31) gives details of the 7th Scientific Assembly in Argentina. To be put on the IAGA mailing list for IAGA News (and other IAGA publications/notices etc.), write to the IAGA Secretary-General, Mike Gadsden, at: Prof Mike Gadsden Secretary-General IAGA Fraser Noble Building Aberdeen University Aberdeen, AB9 2UE SCOTLAND, U.K. 2. Argentina 1993 ================= Our group is active in six (6) sessions at Argentina and there are a number of other sessions of interest to us in Divisions 5 and 7. Please note that the abstract deadline is very early. It is FEBRUARY 28TH 1993. +++++++++++++++++++ (Previous newsletter erroneously said February 15th.) Topic & Convenors ----------------- 1.3: Large-Scale Magnetic & Electromagnetic Anomalies in the Continental Lower Crust [1 half-day] M Mareschal, J L LeMouel & G Schwarz The focus will be on possible correlations between lower-crustal magnetic and electrical anomalis in continental crusts. Papers dealing with magnetic and electric properties of deep crustal rocks and the conditions under which they can co-exist are particularly invited. Also of interest are comparison of observed regional magnetic anomalis and long period EM field data over the same area. 1.4 Electrojet Studies [1 half-day] E Mbipom, J Ferber & N B Trivedi Of particular interest to this session will be papers dealing with recent studies, either ground-based or rocket, of the equatorial electrojet. Model studies, particularly those dealing with 3-D structures in the electrojet are also welcome. In addition, it will be pertinent to consider papers dealing with theory, observation and generation of the counter-electrojet. 1.5 EM Studies of Modern & Ancient Subduction Zones [2 half-days] P Wannamaker, T Korja & Y Ogawa We invite papers dealing with electromagnetic imaging of modern and ancient subduction zones. We focus on the EM results which constrain the tectonic processes of the subduction system. Comparative studies with other geophysical/ geological information will be presented. EM studies of the collision boundaries are also welcome. 1.6 Electromagnetic studies of the oceans and seafloor [2 half-days] S C Constable, H Utada & L L Vanyan This session deals with electrical properties and electromagnetic studies of Earth's ocean system and seafloor. Topics of discussion include, but are not limited to, controlled and natural source soundings of the seafloor, oceanic induction, oceanographic applications of EM methods, the coast effect, and instrumentation. 1.7 Crustal Conductivity Studies with Borehole Control [2 half-days] V Haak, M Lastovickova & A A Zhamaletdinov Do modern techniques of electromagnetic field studies in the vicinity of deep boreholes forecast the drilling results? Can anything be said about the nature of the high conductivity structures from direct observation and about the significance of such structures for petrological or tectonic models? Can comparison of resistivity values from field studies and from borehole measurements change our understanding of the nature of the normal resistivity of the crust? 1.8 Interpretation of conductivity models of the continental lower crust: Fluids or carbon - can we tell the difference? [2 half-days] A G Jones, T Shankland & A Adam The continental lower crust is typically one to two orders of magnitude higher in conductance than laboratory studies would suggest. The two principal competing hypotheses to explain this observation are either saline fluids or interconnected grain-boundary films of carbon. To both, however, there are serious objections. Papers are solicited which address this apparent dichotomy or which propose alternative explanations for this enigma. 1.18 General Contributions to Division I [2 half-days] S-E Hjelt This session will contain contributions to the subject of Internal Magnetic Fields which, by broadness of scope, provocative nature, or originality of subject matter, cannot be accocmodated in one of the more specialized sessions. 5.3 External/internal relations and spatial variations of geomagnetic disturbances at the surface of the Earth [1 half-day] H Deebes & J F Hermance Spatial and temporal variability of external geomagnetic field transients at the Earth's surface and their induced (internal) counterparts, as they relate to 1) nowcasting in support of geomagnetic surveys by aircraft, ships and satellites; 2) predicting induced currents in communication lines, power grids, pipelines etc; and 3) understanding of electromagnetic induction in the solid Earth and interpretation in terms of models. 5.7 External/internal relations for continental and planetary-scale investigations [1 half-day] G P Gregori & M S Zhdanov Techniques for separation of the source and the induced parts of observed geomagnetic fields having wavelengths of importance for regions as small as continents and as large as the Earth, including applications of the separated fields to studies of the Earth and of upper atmosphere properties. 5.8 Studies of quiet-day field variations as applied to main field analysis; crustal magnetics, storm analysis and satellite surveys [1 half-day] W H Campbell & D E Winch Application of quiet-day field modelling to 1) improvement of main-field analysis; 2) induction studies of the Earth's crustal and upper mantle conductivities; 3) determination of a baseline level for geomagnetic disturbance studies; and 4) internal contribution to observed fields in satellite surveys of the magnetosphere. 7.1 Activities and results of the International Equatorial Electroject Year (IEEY) [2 half-days] C A Onwumechili & C Mazaudier 3. Wellington: Contributed papers ================================= The deadline has now passed for submission of manuscripts to Malcolm Ingham. It was DECEMBER 1st 1992. 4. MT-DIW1: Contributed papers ============================== The first magnetotelluric data interpretation workshop was attended by 25 participants, and we had a total of some 15 presentations on various aspects of the COPROD2 and BC87 datasets. We have decided to publish the papers in JGG in a joint special issue with papers submitted to Malcolm Ingham from the EM workshop. The STRICT submission deadline has been set at FEBRUARY 28th 1993; no excuses will be accepted as we have to catch up three months that Malcolm has on us. There will be a second MT-DIW (MT-DIW2) prior to the next EM workshop in 1994. Charlie Swift is actively seeking an industry dataset for us to use. The actual venue is, as yet, undecided. It will not, however, be at the same location as the next EM workshop, Brest, France, but will be located reasonably close by just prior to that workshop. 5. Address List =============== The address list for our working group can be obtained by ftp remote login to directory pub/iaga_wgi.2, file add.lst, as below: yourmachine:/dir% ftp cg.emr.ca Name (cg.emr.ca:jones): anonymous 331 Guest login ok, send ident as password. Password: youremailaddress 230 Guest login ok, access restrictions apply. ftp> cd pub/iaga_wgi.2 250 CWD command successful. ftp> get add.lst 200 PORT command successful. 150 ASCII data connection for wg_i.2 (132.156.46.82,1212) (63498 bytes). 226 ASCII Transfer complete. local: add.lst remote: add.lst 8864 bytes received in 0.055 seconds (1.6e+02 Kbytes/s) ftp> quit 6. Email List ============= The email list for our group can be obtained from the same directory. It is file email.lst. I have appended the current version at the end of this newsletter. This list is only useful if it is current. Please inform me of changes/additions/deletions. 7. Personal Notes [submissions requested for here] ================= Due to cutbacks, Dr Igor Rokityanski has been discharged from his Institute of Geophysics in Kiev. If you are able to employ Igor please contact him as soon as possible. Alan G Jones Ottawa, 5th January, 1993 IAGA Working Group I.2 Internet email list: 4 January 1993 ----------------------------------------------------------- Additions/corrrections/deletions to: jones@cg.emr.ca Temporary addresses identified by termination date A bracketed (R) 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 U Vic numod@uvvm.uvic.ca Anand Kalvey UofA useralpl@mts.ucs.ualberta.ca B.R. Aurora IIG, Bombay bra@iigm0.ernet.in Karsten Bahr U Frankfurt bahr@vax1.rz.uni-frankfurt.dbp.de Dick Bailey UofT bailey@geophy.physics.utoronto.ca Dave Beamish BGS k_dbe@vaxa.nerc-keyworth.ac.uk 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 TU Berlin henri@w413zrz.bg.tu-berlin.de Colin Brown Galway agubrown@bodkin.ucg.ie 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 UA Antonio_Correia@mts.ucs.ualberta.ca Jim Craven GSC craven@cg.emr.ca Al Duba LLNL alduba@llnl.gov Nigel Edwards U Toronto edwards@geophy.physics.utoronto.ca Gary Egbert Oregon State egbe1505@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 Scripps everett@servo.ucsd.edu Ian Ferguson UofM ferguso@wombat.geop.umanitoba.ca Gaston Fischer Switzerland schnegg@on.unine.ch Agusta Flosadottir UW agusta@u.wash.edu (R) Sergio Fontes Brazil userfont@lncc (BITNET) Enrique Gomez-Trevino CICESE egomez@cicese.mx Ross Groom Queen's groom@geolo.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 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@cc.titech.ac.jp Rosemary Hutton Edinburgh rhutton@srv0.glg.edinburgh.ac.uk Malcolm Ingham Wellington ingham@matai.vuw.ac.nz George Jiracek San Diego jiracek@moho.sdsu.edu Andreas Junge Goettingen junge@gwdgv1.dnet.gwdg.de Alan Jones GSC jones@cg.emr.ca Phil Jones Edinburgh egpv27@emas-a.edinburgh.ac.uk (R) Walter Jones Edmonton wjones@terra.phys.ualberta.ca Alain Jornod Neuchatel alain.jornod@on.unine.ch Andreas Junge Goettingen junge@gwdgv1.dnet.gwdg.de Pertti Kaikkonen U Oulu geof-pjk@finou.oulu.fi Toivo Korja U Oulu tkorja@sveka.oulu.fi Ron Kurtz GSC kurtz@cg.emr.ca 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 Ted Lilley ANU fel157@csc.anu.edu.au Dean Livelybrooks Edinburgh dlivelyb@castle.ed.ac.uk Gabriella Losito Florence losito@ingfi1.cineca.it Randy Mackie MIT randy@halley.mit.edu Ted Madden MIT trm@halley.mit.edu Pierre Maregiano SDSU pmaregia@imagine.sdsu.edu Marianne Mareschal Ecole hw00@polytec1 (BITNET) Mario Martinez CICESE mmartinez@cicese.mx Willi Masero Neuchatel masero@on.unine.ch Hans-Martin Maurer Braunschweig i2060505@dbstu1.rz.tu-bs.de Kenneth MacDonald Edinburgh kenny@castle.edinburgh.ac.uk Maxwell Meju Leicester mxw@le.ac.uk Frank Morrison Berkeley hfmengeo@garnet.berkeley.edu Carlos Moyano Argentina cricyt@criba.edu.ar Wilfgang 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 GSJ oga@gsjrstn.gsj.go.jp Doug Oldenburg UBC doug@geop.ubc.ca Steve Park UC Riverside magneto@ucrmt.ucr.edu Ken Paulson U Sask cybpsn@sask.usask.ca Laust Pedersen Uppsala tr@geofys.uu.se M A Perez-Flores CICESE mperez@cicese.mx Risto Pirjola FMI risto.pirjola@fmi.fi (R) Jean-Paul Poirier IPG Paris poirier@ipgp.jussieu.fr Carsten Pretzschner Freiburg pre@geophysik.geowiss.ba-freiberg.dbp.de Art Raiche CSIRO art@syd.deg.csiro.au Thorkild Rasmussen Uppsala tr@geofys.uu.se Volker Rath Berlin volk1638@w413zrz.bg.tu-berlin.de C D Reddy IIG cdreddy@iigm0.ernet.in Augustinho Rigoti Flinders mgar@cc.flinders.edu.au Oliver Ritter Edinburgh oritter@srv0.glg.ed.ac.uk Patricia Ritter Edinburgh pritter@srv0.glg.ed.ac.uk G F Risk IGNS srwggfr@m3g.geo.dsir.govt.nz Jeff Roberts Arizona State jeff_roberts@esciqm.es.lln.gov J M Romo CICESE jromo@cicese.mx Giovanni Santarato Italy v44@ifeuniv.unife.it Adam Schultz Cambridge adam@itg.esc.cam.ac.uk Pierre Schnegg Neuchatel schnegg@on.unine.ch Tom Shankland Los Alamos shanklan@seismo5.lanl.gov Ramesh P Singh Karagpur ramesh@iitk.ernet.in Russian Geophys. Comm. Moscow sgc@node.ias.msk.su Torquil Smith UW torquil@geophys.washington.edu Brian Spies Schlumberger spies@sdr.slb.com Wilhelm Stiefelhagen Koln ad010@aix370.rrz.uni-koeln.de Shinich Takakura NOC, Japan shin@gpsun2.jnoc.go.jp Pascal Tarits Paris tarits@elec.ipgp.jussieu.fr Pascal Tarits Colorado tarits@lemond.Colorado.EDU (->??? 1992) David Thomson Bell labs djt@research.att.com Hiroaki Toh U Tokio mishio@tansei.cc.u-tokyo.ac.jp Carlos Torres-Verdin Schlumberger ctorres@sdr.slb.com Jim Tyburczy Arizona State aojat@asuvm.inre.asu.edu Andreas Tzanis sggp01@grathun1 (BITNET) Toshi Uchida GSJ uch@gsj.go.jp Martyn J. Unsworth UBC unsworth@geop.ubc.ca 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 Keeva Vozoff McQuarie gp_vozoff@vaxd.ocs Harve Waff U Oregon harve@waff.uoregon.edu John Weaver UVic weaver@uvphys.phys.uvic.ca Peter Weidelt Braunsweig i2060505@dbstu1.rz.tu-bs.de Kathy Whaler U Leeds kathy@earth.leeds.ac.uk Jim Wright MUN jim@convex.esd.mun.ca Zonghou Xiong Utah zxiong@mines.utah.edu Chuck Young Michigan ctyoung@mtu.edu Annalisa Zaja Padova terra03@ipdunivx (BITNET) Russian Geophysical Committee sgc@adonis.ias.msk.su