Features of atmospheric disturbances in temperate latitudes before strong earthquakes (M&gt; 7) according to satellite measurements

Valentin Kashkin,Alexey Romanov,Konstantin Simonov,Sanjar Imashev,Leonid Sverdlik,Roman Odintsov,Tatyana Rubleva,V.B Kashkin,V Kharuk,E Loupian,G.M Tsibulśkii,M.V Noskov,L.G Sverdlik,Y.A Maglinets

doi:10.1051/e3sconf/202014903011

Abstract

An ATOVS and MERRA data archive containing temperature values at isobaric levels from 1000 to 50 hPa was formed to study the atmospheric effects observed over the foci of two strong earthquakes with magnitudes M = 7,3. The first seismic event was recorded on August 19, 1992 in the northern Tien Shan and the second on November 12, 2017 in the border areas of the Zagros folded mountain belt. According to USGS intense aftershock activity in these regions began with these seismic events. Using correlation and spectral analysis we studied the vertical profiles of temperature and pressure in a disturbed atmosphere over seismically active regions. The modified anomaly index was calculated at isobaric levels from 500 to 50 hPa and on its basis the registered temperature anomalies were investigated.

Highlights

IntroductionUsing remote sensing data makes it possible to solve the problems of monitoring atmospheric phenomena observed in the geological environment during seismic processes
An ATOVS and MERRA data archive containing temperature values at isobaric levels from 1000 to 50 hPa was formed to study the atmospheric effects observed over the foci of two strong earthquakes with magnitudes M = 7,3
Using remote sensing data makes it possible to solve the problems of monitoring atmospheric phenomena observed in the geological environment during seismic processes

Summary

Introduction

Using remote sensing data makes it possible to solve the problems of monitoring atmospheric phenomena observed in the geological environment during seismic processes. These are atmospheric effects over fault zones of the earth's crust in the form of perturbations of meteorological fields and temperature anomalies [1, 2]. In [1] it is indicated that the movements of the earth's crust excite internal gravitational waves in the atmosphere These processes are accompanied by various variations of geophysical fields and contain valuable information about the features of the observed anomalous phenomena.

Seismic data

Satellite data and analysis technique

Temperature variations

Temperature anomalies

Conclusion