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Insar analysis of the Ayazakhtarma mud volcano and its response to the 2021 Shamakhi earthquake: understanding seismo-volcanic interactions

2023; Issue: 4 Linguagem: Inglês

10.5510/ogp20230400911

2218-8622

Bahruz Ahadov, Fakhraddin Kadirov,

Geological and Geophysical Studies

In this study, the Interferometric Synthetic Aperture Radar (InSAR) method was employed for the first time to examine the correlation between moderate earthquakes and the dynamics of volcanoes in Azerbaijan. InSAR is a powerful technique for explaining the complexities of earthquakes in spatial times, providing more detailed insights into earthquake impacts than traditional methodologies. We analyzed pre-seismic, co-seismic, and post-seismic scenarios to determine potential possible relations between the 2021 Shamakhi earthquake (Mw5) and the Ayazakhtarma mud volcano. This research presents a comprehensive deformation time series data for the volcano derived from Sentinel 1A/B observations spanning 2017 to 2023. Concurrently, radar line-of-sight (LOS) displacement maps are prepared to represent the deformation associated with the earthquake in the pre-, co-, and post-seismic phases. Specifically, our analysis of the Ayazakhtarma mud volcano revealed significant LOS alterations in the pre-, co-, and post-seismic phases of ascending and descending orbits. Also, during a seven-year time series observation of the Ayazakhtarma mud volcano, two seismic events of magnitude Mw5 were recorded. These events demonstrated no significant influence on the mud volcano's activity, indicating that earthquakes of up to Mw ≤ 5 may not prompt significant eruptions in the Ayazakhtarma mud volcano. The study of the interferometric data has revealed fresh insights into the deformation behaviours of the Ayazakhtarma mud volcano and its interplay with seismic events. Keywords: InSAR; deformation; earthquake; volcano; Ayazakhtarma; Azerbaijan.