ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, Vol. 22, No. 1, pp. 56-68

Pre-seismic disturbances of meteorological parameters in the lower atmosphere based on satellite measurements

L.G. Sverdlik 1, 2 
1 Research Station RAS in Bishkek City, Bishkek, Kyrgyzstan
2 Kyrgyz–Russian Slavic University, Bishkek, Kyrgyzstan
Accepted: 03.12.2024
DOI: 10.21046/2070-7401-2025-22-1-56-68
New results of perturbation study in variations of temperature and wind speed during periods of strong seismic activity in Eurasia are presented. The analysis focused on the largest earthquakes of the last two years with magnitudes M ≥ 7.0 that occurred in Turkey (February 6, 2023), China (January 22, 2024), Japan (January 1, 2024) and Taiwan (April 2, 2024). Data from the Global MERRA-2 Reanalysis Archive (MERRA-2 — Modern-Era Retrospective Analysis for Research and Applications, Version 2) were used to investigate pre-seismic effects. In accordance with satellite data processing algorithm, the integral parameter of abnormal variations, calculated as the product of the ratios of sliding variances of time series of temperature in the upper troposphere and the lower stratosphere, was used as an indicator of atmospheric perturbation. As a result of the analysis, pre-seismic mesoscale temperature anomalies were identified, which were localized near the epicentral areas and could be caused by processes occurring in the lithosphere during periods of earthquake preparation. Peak intensity of atmospheric disturbances was observed 1–7 days before the considered events, which can be interpreted as a manifestation of atmospheric gravity waves. Pre-seismic effects were also detected in changes in wind patterns. The analysis of wind speed variation hodographs within the altitude range under examination (~5–25 km) confirmed that pre-seismic periods were characterized by a predominantly upward transfer of wave energy. The combination of these two satellite data sets allowed obtaining more detailed information about atmospheric effects of large earthquakes.
Keywords: satellite measurements, temperature, wind speed, earthquake, upper troposphere, lower stratosphere, STA/LTA criterion, integral parameter, anomaly, hodograph
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