HR: 16:15h
AN: GP22B-02    [PDF]
TI: On the possible occurrence of "archaeomagnetic jerks" in the geomagnetic field over the last three millennia
AU: Gallet, Y
EM: gallet@ipgp.jussieu.fr
AF: Institute de Physique du Globe, 4 place Jussieu, Paris, 75252 France
AU: * Genevey, A
EM: agenevey@ucsd.edu
AF: Institute de Physique du Globe, 4 place Jussieu, Paris, 75252 France
AU: * Genevey, A
EM: agenevey@ucsd.edu
AF: Scripps Institution of Oceanography, University of California, 9500 Gilman Drive, La Jolla, CA 92093-0220 United States
AU: Courtillot, V E
EM: courtil@ipgp.jussieu.fr
AF: Institute de Physique du Globe, 4 place Jussieu, Paris, 75252 France
AB: Archeomagnetism can provide a high-resolution full-vector description of the Earth's magnetic field in the last several thousand years. We analyse the bulk of archeomagnetic data (both direction and intensity) obtained recently in Western Europe and the Eastern Mediterranean covering the last three millennia. We demonstrate a remarkable coincidence between sharp cusps in geomagnetic field direction and intensity maxima (2 clear ones at ~AD 200 and 1400; 2 less well constrained at about 800 BC and AD 800). These sharp changes may constitute a new feature of geomagnetic secular variation ("archeomagnetic jerks") with time characteristics intermediate between "geomagnetic jerks" and "magnetic excursions".
DE: 1503 Archeomagnetism
DE: 1521 Paleointensity
DE: 1522 Paleomagnetic secular variation
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2003 Fall Meeting