期刊
GEOPHYSICAL RESEARCH LETTERS
卷 50, 期 3, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2022GL101258
关键词
seismicity catalog; sea level change; hydrothermal region; strain; strainmeter; solid Earth tides
Research finds that small stress changes, such as sea level fluctuations, can trigger earthquakes. High-resolution seismic catalogs with low detection thresholds are best suited to study this phenomenon.
Small stress changes such as those from sea level fluctuations can be large enough to trigger earthquakes. If small and large earthquakes initiate similarly, high-resolution catalogs with low detection thresholds are best suited to illuminate such processes. Below the Sea of Marmara section of the North Anatolian Fault, a segment of approximate to $\approx $150 km is late in its seismic cycle. We generated high-resolution seismicity catalogs for a hydrothermal region in the eastern Sea of Marmara employing AI-based and template matching techniques to investigate the link between sea level fluctuations and seismicity over 6 months. All high resolution catalogs show that local seismicity rates are larger during time periods shortly after local minima of sea level, when it is already rising. Local strainmeters indicate that seismicity is promoted when the ratio of differential to areal strain is the largest. The strain changes from sea level variations, on the order of 30-300 nstrain, are sufficient to promote seismicity.
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