Japan Geoscience Union Meeting 2018

Presentation information

[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS03] Interdisciplinary studies on pre-earthquake processes

Thu. May 24, 2018 10:45 AM - 12:15 PM A09 (Tokyo Bay Makuhari Hall)

convener:Katsumi Hattori(Department of Earth Sciences, Graduate School of Science, Chiba University), Jann-Yenq Liu(Institute of Space Science, National Central University, Taiwan), Dimitar Ouzounov(Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA, 共同), Qinghua Huang(Peking University), Chairperson:Hattori Katsumi, Huang Qinghua(Peking University)

11:15 AM - 11:30 AM

[MIS03-09] Statistical validation of the possible Lithosphere-Atmosphere-Ionosphere Coupling prior to earthquakes by means of 3.5 years of Swarm satellite electromagnetic data analysis

★Invited Papers

*Angelo De Santis1, On behalf of SAFE and INGV LIMADOU Teams (1.National Institute of Geophysics and Volcanology (INGV))

Keywords:Earthquake , Seismic Precursors, LAIC, Swarm satellites, CSES

SAFE (“Swarm for Earthquake study”) project (funded by ESA in the framework of "STSE Swarm+lnnovation”) deals with the integrated analysis of more physical parameters whose abnormal variations have been found to be possibly associated with impending earthquakes. These observations are mainly: electromagnetic variations, total electron content and the electron density in the ionosphere, measured both from Swarm satellites and ground-based observatories. We show here the results of a systematic analysis of around 3.5 years of magnetic and electron density Swarm satellite anomalies in the whole space-time interval of interest, avoiding high magnetic latitudes, which are correlated with earthquakes by means of a superposed epoch approach. Both magnetic and plasma data analyses show that the anomaly concentrations are larger than random anomaly distributions by a factor of more than 2.5, and a deviation from the random mean by more than 40 times the standard deviation, supporting the hypothesis for a lithosphere-atmosphere-ionosphere coupling in the preparation phase of earthquakes.

The recent launched CSES satellite mission with dedicated scientific payload for pre-earthquake anomaly detection will let us available more electromagnetic data for applying the same techniques for searching precursors of future earthquakes.