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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, 2026, V. 23, No. 2, pp. 150-161

Dynamics of pre-seismic wind speed variations in the Central Asian region

L.G. Sverdlik 1, 2 
1 Research Station RAS in Bishkek City, Bishkek, Kyrgyzstan
2 Kyrgyz–Russian Slavic University, Bishkek, Kyrgyzstan
Accepted: 03.03.2026
DOI: 10.21046/2070-7401-2026-23-2-150-161
The work presents the results of analysis of temporal horizontal wind speed variability in the upper troposphere/lower stratosphere during periods of preparation of 6 earthquakes of magnitudes ≥6,0 occurred in the seismically active Central Asia region in 2015-2016. To distinguish and identify pre-seismic effects in wind speed variations we used measurement data from the MERRA-2 (Modern-Era Retrospective analysis for Research and Applications, Version 2) reanalysis archive. It was found that there were characteristic features of pre-seismic changes in the wind field. Several days before all earthquakes under study the wind speed in the upper troposphere reached maximum values. Polynomial approximation was used as a background to assess fluctuations of zonal and meridional wind components in the area of heights of 5–24 km. Assuming that wind speed perturbations were induced by atmospheric gravity waves, propagation directions of gravity waves were analyzed on the basis of hodograph technique. It has been established that earthquake preparation periods were characterized by intensification of wave action in the upper troposphere with predominantly upward wave energy transfer. Generally, despite the complicated nature of the influence exerted by processes of strong earthquake preparation on atmospheric dynamics in space and time, the results obtained indicate the importance of using meteorological parameters in the study of pre-seismic atmospheric effects.
Keywords: satellite measurements, wind speed, earthquake, upper troposphere, lower stratosphere, perturbation, hodograph
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