IASPEI - Picture Gallery

IUGG XXIV General Assembly July 2-13, 2007 Perugia, Italy
(S) - IASPEI - International Association of Seismology and Physics of the Earth's
Interior
JSS008 Poster presentation 2012
Complex Electromagnetic monitoring of Corinth Gulf seismic area
(Greece): Fuzzy logic algorithms time series pattern recognition
Dr. Zlotnicki Jacques
Magmas and Volcanoes Laboratory CNRS IAGA
Gvishiani A., Le Moul J.L., Rodkin M., Agayan S., Bogoutdinov Sh., Vargemezis G.
During several decades many studies have focused on the search of electric, magnetic and/or
electromagnetic (EM) precursors of earthquakes (and volcanic eruptions). In particular, electric signals
in the ULF band (less than 10Hz) have largely been investigated, and some results of possible precursor
signals were revealed and discussed. But, these signals are not systematically observed in every seismic
area.Our study is devoted to CorinthGulf seismic area. During the last years, an EM monitoring system
of three stations was developed with the objective to do systematic observations, from DC up to several
kHz. These ground based studies are done in the frame of Demeter mission, whose goal is to identify
and correlate forerunners EM signals to earthquakes, at the ground surface and on board of the microsatellite
Demeter. The three EM stations bound a seismic gap, along which a magnitude 6 earthquake is
expected. At the three stations, horizontal electric and three components magnetic fields are recorded
at 100Hz. At two stations, horizontal electric and magnetic fields are also recorded at 1kHz, while these
fields are measured, every hour, at 10 kHz during 5 minutes in the centre of the seismic gap.Up to now,
small earthquakes (M