Very-long-range dynamic triggering of mud volcano unrest and silent magnitude-6 fault slip

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Conflicts of Interest

Identified Weaknesses

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Paper Summary

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Faraway Earthquakes Trigger Mud Volcanoes and Silent Slip: A Case Study in the Kura Basin

This study reports on the remote triggering of unrest at over 50 mud volcanoes and a large-scale aseismic slip event on a network of faults in the Kura Basin, caused by the February 2023 Kahramanmaraş earthquakes in Türkiye, over 1000 km away. The researchers attribute this extensive phenomenon, equivalent to a Mw 6.1 earthquake, to changes in pore pressure at depth due to seismic waves, triggering slip along pre-existing faults.

Possible Conflicts of Interest

None identified

Identified Weaknesses

Limited temporal resolution

The InSAR data lacks the temporal resolution to pinpoint the exact timing of the transient slip and mud volcano activity, making it difficult to definitively establish a causal chain and mechanism.

Lack of detailed subsurface data

Limited access to piezometric well data and other subsurface information hinders a complete understanding of fluid pressure changes and their direct relationship with the observed slip and mud volcano eruptions.

Simplified fault model

Assuming vertical faults for modeling purposes might not accurately represent the true fault geometry at depth, potentially affecting the slip distribution estimates.

Rating Explanation

This research presents a compelling case for long-range dynamic triggering of mud volcanoes and aseismic slip, significantly expanding our understanding of remote earthquake effects. The detailed analysis of InSAR, GNSS, and seismic data, coupled with observations of mud volcano activity, makes a strong argument for a fluid-driven mechanism. While limitations regarding temporal resolution and subsurface data exist, they do not invalidate the central findings and the study's overall significance.

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