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Dynamic Triggering of Seismicity in the Hindu Kush-Tien Shan Region.

Dixit M, Saini T, Bansal AR.

PURE AND APPLIED GEOPHYSICS

https://link.springer.com/article/10.1007/s00024-026-03965-6 

The study analyzed 26 years of seismic waveform data to understand how large distant earthquakes can trigger seismic activity in the Hindu Kush–Tien Shan region. The study identified multiple instancesin which low-frequency surface waves generated by major global earthquakes triggeredlocal tremors and earthquakes. The findings reveal that such triggering occurs only when dynamic stresses exceed a critical threshold of approximately 15 kPa, suggesting that this region is comparatively less sensitive to remote earthquake triggering than many other tectonically active regions worldwide.

Fig: Dynamic triggering of local earthquakes and tremors by surface waves from the 2001 Mw 7.8 Qinghai earthquake.

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