What is it about?
Seismic velocity changes caused by large earthquakes or volcanic activities have been studied to understand the mechanical properties of the shallow structure. However, the mechanism of seismic velocity changes is under investigation. This paper examines the seismic velocity changes due to static stress changes using volcanic deformation at a quiet volcano. We also investigate seismic velocity changes at different depths to understand the characteristics of velocity sensitivity to stress changes.
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Why is it important?
We find a significant depth dependence of the stress sensitivity of the seismic velocity changes. The stress sensitivity based on the granular theory can be used for the estimation of stress sensitivity of seismic velocity changes at different depths.
Perspectives
I hope this article helps understanding the mechanism of seismic velocity changes caused by large earthquakes or volcanic activities.
Tomoya Takano
Read the Original
This page is a summary of: Seismic velocity changes concentrated at the shallow structure as inferred from correlation analyses of ambient noise during volcano deformation at Izu-Oshima, Japan, Journal of Geophysical Research Solid Earth, August 2017, Wiley,
DOI: 10.1002/2017jb014340.
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