[M-IS08] Interdisciplinary studies on pre-earthquake processes

[MIS08-01] The spatiotemporal evolution of pre-earthquake anomalies and their association with the activation zone

*Dimitar Ouzounov¹, Sergey Pulinets², J.Y Liu³, Katsumi Hattori⁴, Patrick Taylor⁵ (1.Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA, 2.Space Research Institute, Russian Academy of Sciences, Moscow, Russia, 3.Center for Space and Remote Sensing Research, National Central University, Taoyuan, Taiwan, 4.Department of Earth Sciences, Graduate School of Science, Chiba University, Chiba, Japan, 5.NASA GSFC, Greenbelt, MD, USA )

Keywords:pre-earthquake, precursor, thermal anomaly, GPS/TEC

We studied the temporal and spatial phenomenon between Thermal Radiation (TRA); Ionospheric total electron content (TEC); and; abnormal patterns of radon data and their relationship with earthquake activation zones (EAZ). For the estimates of each EAZ, we use Dobrovolsky et al. (1979) and Bowman et al. (1998), where the EAZ radius scales exponentially with earthquake magnitude, especially for Mw 6.0 and larger. This gives a broader study of larger magnitudes earthquakes and TRA and TEC anomalies. We analyzed 10 large (M6+) earthquakes (2004-2019) for TRA and TEC anomalies in each of the EAZ zones. Our results show evolutionally patterns in the appearance of pre-earthquake transient effects in the atmosphere and ionosphere, with a short time-lag, from hours up to a few days, and scalable with a magnitude estimate at their unusually far distance from the epicenter (for the M7+ events). The spatial characteristics of pre-earthquake anomalies were associated with the larger area but always inside the preparation-activation region estimated by Dobrovolsky-Bowman. The pre-earthquake pattern of the atmosphere and ionosphere signals, revealed by a simultaneous analysis of satellite, GPS/TEC, Satellite Earth observations, and ground data, all suggesting that these earthquakes follow a global recognizable spatial pattern of TRA and TEC.