Robust estimation of seismic coda shape
نویسندگان
چکیده
منابع مشابه
Fluid Flow Property Estimation from Seismic Scattering Data
All geophysical methods detect fractures indirectly [e.g. NAS/NRC, 1996]. Typically several levels of interpretation follow the collection of raw geophysical data. Field measurements must first be interpreted (for example from travel time to velocities or identification of the origin of seismic scattering features in the coda). Then the fracture properties must be deduced using models (from sei...
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Identifying Underground Nuclear Explosions (UNEs) and discriminating them from natural earthquakes is a critical issue for the verification of the Comprehensive nuclear-Test-Ban Treaty (CTBT). The earthquake source is described as a shear dislocation on a fault plane, which generates both Pand S-wave at the source. On the other hand, the nuclear explosion source is described as an isotropic vol...
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The local earthquake events recorded north of Panjal thrust (=Main Central thrust) and Main Boundary Thrust (MBT) by the four broadband seismological observatories located at Jammu, Poonch, Doru and Bani in Jammu and Kashmir from January to May, 2012 have coda magnitudes ranging from 1.7 to 3.8 were used to compute source parameters namely; seismic moment, source radius, and stress drop. These ...
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The three-dimensional (3-D) P-wave attenuation (Qp ) structure beneath Kanto, Japan, is estimated by using a large number of waveform data. Corner frequencies of earthquakes are initially calculated from spectral ratios of S-coda waves, followed by an inversion to simultaneously determine attenuation terms and frequency-dependent site amplification factors. The attenuation terms are then invert...
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Coda-wave interferometry is a technique to detect small seismic velocity changes using phase changes in similar waveforms from repeating natural or artificial sources. Seismic interferometry is another technique for detecting seismic velocity changes from cross-correlation functions of ambient seismic noise. We simultaneously use these two techniques to clarify seismic velocity changes at Sakur...
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