Tremor along the Dead Sea Transform remotely triggered by the 2023 MW7.6 Kahramanmaraş earthquake

Abstract Tremor signals are weak and emergent, and the physics governing their generation is not well understood. Here, I report on tremor occurring along the Dead Sea Transform (DST), and a microearthquake on the Carmel-Fari’a Fault (CFF), both remotely triggered by the 2023 M W 7.6 Kahramanmaraş e...

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Bibliographic Details
Published in:Communications earth & environment 2024-12, Vol.5 (1), p.105, Article 105
Main Author: Inbal, Asaf
Format: Article
Language:English
Subjects:
Acceleration
Concentration gradient
Earthquakes
Seismic activity
Seismic energy
Seismology
Surface waves
Tectonics
Tremors
Velocity gradient
Vibrations
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Summary:Abstract Tremor signals are weak and emergent, and the physics governing their generation is not well understood. Here, I report on tremor occurring along the Dead Sea Transform (DST), and a microearthquake on the Carmel-Fari’a Fault (CFF), both remotely triggered by the 2023 M W 7.6 Kahramanmaraş earthquake. The triggered events location coincides with maxima of long-period velocity gradients, concentrated in the CFF-DST intersection and near a CFF fault-jump. Relative to other remotely triggered tremors, the DST tremor is strong and deficient in high-frequency seismic energy. Furthermore, analysis of several remotely triggered tremor episodes suggests that tremors spectral fall-off rates are not universal. I discuss the seismological attributes that may give rise to these observations in the context of two models. In the first, tremor is produced due to inertial vibrations of a frictionally-controlled oscillator, and in the second it is produced by a swarm of Low-Frequency Earthquakes.
ISSN:2662-4435
2662-4435
DOI:10.1038/s43247-024-01266-1