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

[MIS03-03] Multi parameters observations of pre-earthquake signals associated with M6.4 of Feb 06, 2016 in Taiwan. Preliminary results.

*Dimitar Ouzounov¹、Lou C. Lee²、J.Y. Liu³、C.H Chen³、Sergey Pulinets⁴、Menas Kafatos¹ (1.Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA、2.Institute of Earth Sciences, Academia Sinica, Taiwan、3.Institute of Space Science, National Central University, Taiwan、4.Space Research Institute, Russian Academy of Sciences, Moscow, Russia)

キーワード：earthqauke, precursor, forecasting, prediction

We are conducting validation on temporal-spatial pattern of multi parameter signals with pre–earthquake origin associated with M 6.4 of Feb 02, 2016 earthquake in Taiwan.The continues analysis of outgoing long-wavelength radiation (OLR) obtained from NPOESS show rapid increase of OLR on the top of the atmosphere on Jan 1-2, 2016 (2.5 sigma significance for 25 years of analysis) and probably indicated for a large earthquake preparation process in Taiwan(map is attached). The time series variations of atmospheric chemical potential, characterizing the ionization processes inside ABL, show rapid increases during Jan 1-5 and Jan 10-15, 2016 periods. The Gamma network consisted by 4 stations registered similar anomalous pattern in increasing of the radon level during period of Jan 10-15, 2016 simultaneously on three of the stations close to the epicenter. Based on the 3-component geomagnetic data from 3 stations, high-conductivity anomalies were found in two different periods: i)Jan. 31-Feb. 3, 2016 - the anomalies were observed very close to the main shock and the ii)Feb. 2-Feb. 6, 2016 - anomalies are further North and associated with the followed aftershocks. The GIM reveals the TEC significantly enhances over Taiwan on 5 February 2016, one day before the earthquake.
Our preliminary analysis of simultaneous space and grounds measurements associated with M6.4 of Feb 06, 2016 in Taiwan suggest that pre-earthquake phase follows a general temporal-spatial evolution pattern reviled with multi instruments observations, which has been seen in other large earthquakes worldwide.