Relationship Between Seismic Moment and Source Duration for Seismogenic Earthquakes in Taiwan: Implications for the Product of Static Stress Drop and the Cube of Rupture Velocity,Pure and Applied Geophysics

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Relationship Between Seismic Moment and Source Duration for Seismogenic Earthquakes in Taiwan: Implications for the Product of Static Stress Drop and the Cube of Rupture Velocity
Pure and Applied Geophysics ( IF 2 ) Pub Date : 2020-01-27 , DOI: 10.1007/s00024-020-02429-9
Ruey-Der Hwang , Cheng-Ying Ho , Tzu-Wei Lin , Wen-Yen Chang , Yi-Ling Huang , Cai-Yi Lin , Chiung-Yao Lin

A systematic analysis of the source duration ( τ ) and seismic moment ( M 0 ) for seismogenic earthquakes ( M W 5.5–7.1) in the Taiwan region was completed by using a teleseismic P -wave inversion method. Irrespective of the source self-similarity, the M 0 – τ relationship derived in this study had a power-law form, namely M 0 ∝ τ 3 , under the assumption that Δ σV r 3 is constant following a circular fault model (Δ σ : static stress drop; V r : rupture velocity). For Taiwan’s earthquakes, the derived M 0 – τ relationship not only provides information to predict the source duration of large earthquakes, but also probes the rupture features of seismogenic earthquakes. That is, there are different rupture patterns for earthquakes, but the product Δ σV r 3 remains nearly constant.

更新日期：2020-01-27

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