HR: 1340h
AN: S13B-0194    [Abstracts]
TI: Impact of the 1999 Mw 7.2 Duzce, Turkey Earthquake on the Seismic Activity Previously Generated by the Izmit Earthquake
AU: * Daniel, G
EM: Guillaume.Daniel@obs.ujf-grenoble.fr
AF: Laboratoire de Geophysique Interne et Tectonophysique (LGIT), Maison des Geosciences 1381 rue de la piscine B.P. 53, Grenoble Cedex 9, 38041 France
AU: MARSAN, D
EM: David.Marsan@univ-savoie.fr
AF: Laboratoire de Geophysique Interne et Tectonophysique (LGIT), Universite de Savoie Campus Scientifique, Le Bourget du Lac, 73376 France
AU: Bouchon, M
EM: Michel.Bouchon@obs.ujf-grenoble.fr
AF: Laboratoire de Geophysique Interne et Tectonophysique (LGIT), Maison des Geosciences 1381 rue de la piscine B.P. 53, Grenoble Cedex 9, 38041 France
AB: Statistical analysis of the seismicity rate variations consecutive to the Nov, 12 1999 M_w 7.2 Düzce earthquake is performed over the Westernmost part of the North Anatolian Fault. Observed activity rates are compared with extrapolation of the seismicity generated by the Aug, 17 1999 M_w 7.4 Izmit earthquake, based on Omori-Utsu or on ETAS model decay laws. We observe an episode of seismicity rate reactivation within the swarm of Yalova, Turkey, with a 99% confidence level for the first month following the Düzce earthquake, that we propose has been dynamically triggered by the propagating seismic waves consecutive to that mainshock. Seismic activity within this swarm started 2 days after the occurrence of the Izmit earthquake and was reactivated 18 hours following the Düzce earthquake. Finally, we mention that Yalova swarm seems to have experienced a quiescence of activity that started about 1 month after the Düzce earthquake.
DE: 3270 Time series analysis (1872, 4277, 4475)
DE: 7223 Earthquake interaction, forecasting, and prediction (1217, 1242)
SC: Seismology [S]
MN: Fall Meeting 2005