Japan Geoscience Union Meeting 2016

Presentation information


Symbol S (Solid Earth Sciences) » S-SS Seismology

[S-SS24] Earthquake prediction and forecast

Thu. May 26, 2016 1:45 PM - 3:15 PM 105 (1F)

Convener:*Junichi Nakajima(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Chair:Masami Okada(Meteorological Research Institute), Fuyuki Hirose(Seismology and Tsunami Research Department, Meteorological Research Institute)

2:00 PM - 2:15 PM

[SSS24-02] Statistical investigation of pre-seismic ionospheric disturbance from the in-situ plasma observation of the DEMETER

*Hidetoshi Nitta1, Shoho Togo1, Masashi Kamogawa1, Jean-Jacques Berthelier2, Tetsuya Kodama3, Toshiyasu Nagao4 (1.Department of Physics, Tokyo Gakugei University, 2.LATMOS, France, 3.Earth Observation Research, 4.Earthquake Prediction Research Center, Tokai University)

Keywords: Earthquake, DEMETER, Ionosphere

We investigate ionospheric disturbance observed by the DEMETER plasma probes, which are ISL (Electron density and temperature) and IAP (Ion density and temperature). Since there are several papers concerning the pre-seismic ionospheric disturbance by using the data of electron/ion densities and temperature, we verify the reported pre-seismic anomalies by means of superposed epoch analysis. From the whole data set of the DEMETER, the superposed epoch analysis showed that the plasma disturbance appeared near the epicenter around 40 hours before the earthquakes. On the other hand, in the case of randomly generated earthquake catalogue, no similar anomalies appeared.