Dijkstra’s single-source shortest path algorithm has been applied in seismic tomography to determine paths of minimum travel time from all locations in a 3D earth model to sensors used in seismic experiments. An iterative data parallel algorithm is formulated for seismic tomography based on the Bellman-Ford-Moore (BFM) algorithm. Performance is demonstrated for OpenMP and OpenCL.

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 ...

The increased availability and fidelity of broadband seismic instruments have played a key role in bridging the gap between exploration and global seismic applications. Long gone are the days when global structure mapping and source characterization/monitoring relied on the manual digitization of WWSSN (World-Wide Standard Seismographic Network) analogue records or hours in front of microfiche ...

Seismic interferometry allows one to create a virtual source inside a medium, assuming a receiver is present at the position of the virtual source. We discuss a method that creates a virtual source inside a medium from reflection data measured at the surface, without needing a receiver inside the medium and, hence, going beyond seismic interferometry. In addition to the reflection data, an esti...

Forty-six mining-induced seismic events with moment magnitude between -1.2 and 2.1 that possibly caused damage were studied. The events occurred between 2008 and 2013 at mining level 850–1350 m in the Kiirunavaara Mine (Sweden). Hypocenter locations were refined using from 6 to 130 sensors at distances of up to 1400 m. The source parameters of the events were re-estimated using spectral analysi...

We present a comprehensive processing tool for the real-time analysis of the source mechanism of Very-Long-Period (VLP) seismic data based on waveform inversions performed in the frequency domain for a point source. A search for the source providing the best-fitting solution is conducted over a three-dimensional grid of assumed source locations, in which the Green’s functions associated with ea...

bandar abbas (center of hormozgan province) is the most important port city in the south of iran because of its historical places, cultural, economic, social and political importance. high risk of earthquake occurrence in this city and its province indicates the necessity of surveying the seismic vulnerability of buildings. the object of this paper is collected from existing buildings, compiled...

Hazards from gravity-driven instabilities on hillslope (termed 'landquake' in this study) are an important problem facing us today. Rapid detection of landquake events is crucial for hazard mitigation and emergency response. Based on the real-time broadband data in Taiwan, we have developed a near real-time landquake monitoring system, which is a fully automatic process based on waveform invers...

Detailed seismic investigation of an unusually intense earthquake swarm which occurred in the northern Gulf of California during March 1969 has provided new information about seismic processes which occur on actively spreading oceanic ridges and has placed some constraints on the elastic wave velocities beneath them. Activity during this swarm was similar to that of a foreshock-mainshock-afters...