| Seismic and Geophysical Characterization of Northern Asia |
Sep 2010 |
12 pages |
| Authors:
Kevin Mackey; Hans Hartse; Kazuya Fujita; Michael Pasyanos; Michael Begnaud; LOS ALAMOS NATIONAL LAB NM
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 | We have begun a major research effort consisting of a combination of seismic field deployments, historical seismic data retrieval, and seismic data analysis to further improve the calibration of northern Asia for nuclear explosion monitoring purposes. This project builds off previous work, and is a cooperative effort between Michigan State University (MSU), Los Alamos National Laboratory (LANL), Lawrence Livermore National Laboratory (LLNL) and several seismic networks in Russia and Japan. ... |
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| Seismic Velocity Estimation in the Middle East from Multiple Waveform Functionals: P & S Receiver Functions, Waveform Fitting, and Surface Wave Dispersion |
Sep 2010 |
12 pages |
| Authors:
Mrinal K Sen; Jay Pulliam; Utpal Dutta; Ranjana Ghosh; Rengin Gok; Michael Pasyanos; TEXAS UNIV AT AUSTIN
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| We demonstrated that SPL waveform data, together with associated phases, are able to constrain crustal and upper mantle seismic wave velocity structures. Forward modeling is done using a reflectivity algorithm and optimization is carried out using an algorithm called very fast simulated annealing (VFSA). The code runs efficiently on multiple processors using MPI routines. |
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| High-Resolution Seismic Velocity and Attenuation Models of the Caucasus-Caspian Region |
30-Sep-2008 |
10 pages |
| Authors:
Robert Mellors; Rengin Gok; Michael Pasyanos; Gleb Skobeltsyn; Ugur Teoman; Tea Godoladze; Eric Sandvol; SAN DIEGO STATE UNIV CA
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| The southwest edge of Eurasia is a tectonically and structurally complex region that includes the Caspian and Black Sea basins, the Caucasus Mountains, and the high plateaus south of the Caucasus. Using data from 25 broadband stations located in the region, new estimates of crustal and upper mantle thickness, velocity structure, and attenuation are being developed. Receiver functions have been determined for all stations. Depth to Moho is estimated using ... |
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| Evaluation of the Performance of Broadband Networks and Short Period Arrays in Global Monitoring, |
14 AUG 1995 |
8 pages |
| Authors:
Douglas Dreger; Michael Pasyanos; Barbara Romanowicz; CALIFORNIA UNIV BERKELEY SEISMOGRAPHIC STATION
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| This study is a collaborative effort between the UC Berkeley Seismographic Station and the Lawrence Livermore National Laboratory to examine the performance of various seismographic systems in the regional monitoring of a Comprehensive Test Ban Treaty. Central California, with its abundant seismicity, regional broadband network (UCB BDSN), and dense short-period network (USGS NCSN) provides an ideal test-bed for the estimation of detection and location thresholds, source depth, and the seismic ... |
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Reports by Author
