Rapid Moment Tensor Inversion of Earthquakes near Japan for Tsunami Warning: Numerical Experiments
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چکیده
منابع مشابه
Rapid Full-Wave Centroid Moment Tensor (CMT) Inversion in a Three-Dimensional Earth Structure Model for Earthquakes in Southern California
S U M M A R Y A central problem of seismology is the inversion of regional waveform data for models of earthquake sources. In regions such as Southern California, preliminary 3-D earth structure models are already available, and efficient numerical methods have been developed for 3-D anelastic wave-propagation simulations. We describe an automated procedure that utilizes these capabilities to d...
متن کاملObservation of Local and Distant Earthquakes and Tsunami Warning System
In Japan, Japan Meteorological Agency, JMA, has the official responsibility for the public for tsunami forecasts and issuance of tsunami information. For the tsunami forecast the first step is precise and prompt estimation of the location and magnitude of the earthquake because generation of tsunami is strongly controlled by the focal depth and the magnitude of the earthquake. In case that the ...
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S U M M A R Y W phase is a long period phase arriving before S wave. It can be interpreted as superposition of the fundamental, first, second and third overtones of spheroidal modes or Rayleigh waves and has a group velocity from 4.5 to 9 km s−1 over a period range of 100–1000 s. The amplitude of long period waves better represents the tsunami potential of an earthquake. Because of the fast gro...
متن کاملSpectral-Element Moment Tensor Inversions for Earthquakes in Southern California
We have developed and implemented an automated moment tensor inversion procedure to determine source parameters for southern California earthquakes. The method is based upon spectral-element simulations of regional seismic wave propagation in an integrated 3D southern California velocity model. Sensitivity to source parameters is determined by numerically calculating the Fréchet derivatives req...
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ژورنال
عنوان ژورنال: Zisin (Journal of the Seismological Society of Japan. 2nd ser.)
سال: 1987
ISSN: 0037-1114,1883-9029,2186-599X
DOI: 10.4294/zisin1948.40.3_365