Combining Multiple Technologies for Improved Regional Seismic Event Depth Estimation

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$749,732.00
Award Year:
2004
Program:
SBIR
Phase:
Phase II
Contract:
DE-FG02-03ER83820
Award Id:
61535
Agency Tracking Number:
73114S03-I
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
57 Bedford Street, Suite 102, Lexington, MA, 02420
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
DelaineReiter
Dr.
(781) 860-0114
delaine@westongeophysical.com
Business Contact:
JamesLewkowicz
Mr.
(781) 860-0127
jiml@westongeophysical.com
Research Institute:
n/a
Abstract
73114-In regions with relatively few seismic stations and small-to-intermediate-magnitude events, traditional location methods frequently fail to provide event depth estimates with the accuracy required for nuclear test monitoring. Therefore, improved algorithms for precise depth estimation from regional seismic array data are needed. This project will develop a synergistic tool that combines three different technologies for estimating depth from regional seismic waveforms: (1) improved depth phase detection in the complex Pn coda of regional seismograms, (2) depth estimates from sparse-network locations with Monte Carlo confidence regions, and (3) focal depths resulting from surface-wave spectral inversions. Phase I demonstrated that wavelet de-noising is a successful method of isolating depth phases on complex regional seismograms, thereby proving the feasibility of the first technique. In addition, it was determined that optimal Wiener filtering offered increased depth phase detection over standard Fourier filtering. Phase will continue the development of the depth phase detection algorithm by incorporating improved wavelet de-noising and optimal Wiener filtering. The technique will be applied to regional array data from regions of high nuclear monitoring interest. Commercial Applications and Other Benefits as described by awardee: Improved seismic event depth estimates should improve the detection and identification of nuclear tests in foreign countries. In addition, the technology could be used by gas and oil exploration firms to remove unwanted multiples or ghosts (e.g., ocean bottom/surface reflections) from seismic reflection surveys, thereby improving their ability to process seismic data for the discovery of new oil reserves.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government