We have used broadband records from 18 teleseismic stations and three-component records from 16 local strongmotion stations in a formal inversion to determine the temporal and spatial distribution of slip during the earthquake. Separate inversions of the teleseismic (periods, 3Contribution No. 4935, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA ...

S U M M A R Y In many regions of the world characterized by a relatively low rate of seismicity, the determination of local and regional seismic source parameters is often restricted to an analysis of the first onsets of P waves (or first motion analysis) due to incomplete information about Earth structure and the small size of the events. When rare large earthquakes occur in these regions, the...

We simultaneously invert the strong-motion velocity records and the longand intermediate-period teleseismic P waveforms of the 19 September 1985 Michoacan, Mexico, earthquake to recover the distribution of slip on the fault using a point-by-point constrained and stabilized, least-squares inversion method. A fault plane with strike fixed at 300 ° and dip fixed at 14 ° is placed in the region of ...

We report a study using teleseismic P-wave receiver functions to infer the orientation of maximum horizontal principal stress from direction upper crustal shear-wave velocity anisotropy. apply an inverse approach Neighborhood Algorithm conduct nonlinear search, attaining best-fitting model that includes shear Unlike previous methods reported in literature, this method is able distinguish anisot...

We have determined a detailed three-dimensional P wave velocity structure of the Japan subduction zone to 500-km depth by inverting local, regional, and teleseismic data simultaneously. We used 45,318 P wave arrivals from 1241 shallow and deep earthquakes which occurred in and around the Japan Islands. The arrival times are recorded by the Japan University Seismic Network which covers the entir...

Spectral analysis of teleseismic body phases at several azimuths was used to determine the moment, fault length, dislocation, stress-drop, and radiated energy of the Borrego Mountain earthquake. The results agree well with the same parameters obtained from the surface fracture and aftershock distribution and local observations of radiated energy.