Articles | Volume 20, issue 12
Nat. Hazards Earth Syst. Sci., 20, 3333–3341, 2020
https://doi.org/10.5194/nhess-20-3333-2020
Nat. Hazards Earth Syst. Sci., 20, 3333–3341, 2020
https://doi.org/10.5194/nhess-20-3333-2020

Research article 09 Dec 2020

Research article | 09 Dec 2020

Spatiotemporal changes of seismicity rate during earthquakes

Chieh-Hung Chen et al.

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Short summary
Scientists demystify stress changes before mainshocks and utilize the foreshocks as an indicator. We investigate changes in seismicity far from mainshocks by using tens of thousands of M ≥ 2 quakes for 10 years in Taiwan and Japan. The results show that wide areas exhibit increased seismicity occurring more than several times in areas of the fault rupture. The stressed crust triggers resonance at frequencies varying from ~ 5 × 10–4 to ~ 10–3 Hz that is supported by the resonant frequency model.
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