Regional Signal Characteristics for Use in Screening Seismic Events in Rockburst Areas
Because of their shallow focal depths, small magnitudes, and often anomalous focal mechanisms, rockbursts may sometimes be difficult to discriminate from other seismic source types. The goals of this research project are to improve CTBT monitoring capability in the vicinity of rockburst areas by car...
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ftdtic:ADA530002 2023-05-15T17:04:58+02:00 Regional Signal Characteristics for Use in Screening Seismic Events in Rockburst Areas Bennett, Theron J. Marshall, Margaret E. Cook, Ronald W. MAXWELL TECHNOLOGIES INC SAN DIEGO CA 2000-09 text/html http://www.dtic.mil/docs/citations/ADA530002 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA530002 en eng http://www.dtic.mil/docs/citations/ADA530002 Approved for public release; distribution is unlimited. DTIC Seismology Seismic Detection and Detectors *SEISMIC DATA DISCRIMINANT ANALYSIS SYMPOSIA MONITORING SEISMIC DETECTION ROCK MECHANICS JAPAN SIGNALS SEISMIC WAVES RUSSIA SOUTH AFRICA POLAND NORTH AMERICA SEISMOLOGICAL STATIONS SHALLOW DEPTH USSR ANOMALIES ROCKBURSTS TELESEISMOLOGY REB(REGIONAL EVENT BULLETINS) IMS(INTERNATIONAL MONITORING SYSTEM) KOLA PENINSULA PIDC(PROTOTYPE INTERNATIONAL DATA CENTRE) Text 2000 ftdtic 2016-02-23T03:47:18Z Because of their shallow focal depths, small magnitudes, and often anomalous focal mechanisms, rockbursts may sometimes be difficult to discriminate from other seismic source types. The goals of this research project are to improve CTBT monitoring capability in the vicinity of rockburst areas by carefully analyzing the characteristics of rockburst sources and signals and to develop better regional discrimination techniques for these events using International Monitoring System (IMS) station observations. To accomplish this objective we have collected PIDC data from more than 1000 events in the vicinity (within 50 km) of 35 known historical rockburst sites worldwide for the five year time period starting at the beginning of 1995; 27 other sites of historical rockburst produced no events in the REB during this time period. Based on these REB data, the most active rockburst areas were found to be in Poland, the Kola Peninsula in northern Russia, and South Africa; but rockburst areas in North America, Germany, Tajikistan, and Japan have also been investigated. Although the majority of these events had REB magnitudes in the range 3 is less than or equal to m(b) is less than or equal to 4, very few (n = 5) were "screened" by the nominal screening procedures at the PIDC. A somewhat larger number (n = 49) were "not-screened," but most were "not considered" or had "insufficient data" for screening. We have analyzed the PIDC screening results for these rockburst events in detail, and they indicate that teleseismic discrimination procedures are not likely to be effective for screening these rockburst sources. However, there does appear to be some evidence that regional signals recorded by IMS stations from events in these rockburst areas may have differences related to source type. Proceedings of the Annual DoD/DOE Seismic Research Symposium (22nd): Planning for Verification of and Compliance with the Comprehensive Nuclear-Test-Ban Treaty (CTBT) held in New Orleans, Louisiana on 13-15 September 2000. U.S. Government or Federal Rights. The original document contains color images. Text kola peninsula Defense Technical Information Center: DTIC Technical Reports database Kola Peninsula Orleans ENVELOPE(-60.667,-60.667,-63.950,-63.950) |
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Defense Technical Information Center: DTIC Technical Reports database |
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English |
topic |
Seismology Seismic Detection and Detectors *SEISMIC DATA DISCRIMINANT ANALYSIS SYMPOSIA MONITORING SEISMIC DETECTION ROCK MECHANICS JAPAN SIGNALS SEISMIC WAVES RUSSIA SOUTH AFRICA POLAND NORTH AMERICA SEISMOLOGICAL STATIONS SHALLOW DEPTH USSR ANOMALIES ROCKBURSTS TELESEISMOLOGY REB(REGIONAL EVENT BULLETINS) IMS(INTERNATIONAL MONITORING SYSTEM) KOLA PENINSULA PIDC(PROTOTYPE INTERNATIONAL DATA CENTRE) |
spellingShingle |
Seismology Seismic Detection and Detectors *SEISMIC DATA DISCRIMINANT ANALYSIS SYMPOSIA MONITORING SEISMIC DETECTION ROCK MECHANICS JAPAN SIGNALS SEISMIC WAVES RUSSIA SOUTH AFRICA POLAND NORTH AMERICA SEISMOLOGICAL STATIONS SHALLOW DEPTH USSR ANOMALIES ROCKBURSTS TELESEISMOLOGY REB(REGIONAL EVENT BULLETINS) IMS(INTERNATIONAL MONITORING SYSTEM) KOLA PENINSULA PIDC(PROTOTYPE INTERNATIONAL DATA CENTRE) Bennett, Theron J. Marshall, Margaret E. Cook, Ronald W. Regional Signal Characteristics for Use in Screening Seismic Events in Rockburst Areas |
topic_facet |
Seismology Seismic Detection and Detectors *SEISMIC DATA DISCRIMINANT ANALYSIS SYMPOSIA MONITORING SEISMIC DETECTION ROCK MECHANICS JAPAN SIGNALS SEISMIC WAVES RUSSIA SOUTH AFRICA POLAND NORTH AMERICA SEISMOLOGICAL STATIONS SHALLOW DEPTH USSR ANOMALIES ROCKBURSTS TELESEISMOLOGY REB(REGIONAL EVENT BULLETINS) IMS(INTERNATIONAL MONITORING SYSTEM) KOLA PENINSULA PIDC(PROTOTYPE INTERNATIONAL DATA CENTRE) |
description |
Because of their shallow focal depths, small magnitudes, and often anomalous focal mechanisms, rockbursts may sometimes be difficult to discriminate from other seismic source types. The goals of this research project are to improve CTBT monitoring capability in the vicinity of rockburst areas by carefully analyzing the characteristics of rockburst sources and signals and to develop better regional discrimination techniques for these events using International Monitoring System (IMS) station observations. To accomplish this objective we have collected PIDC data from more than 1000 events in the vicinity (within 50 km) of 35 known historical rockburst sites worldwide for the five year time period starting at the beginning of 1995; 27 other sites of historical rockburst produced no events in the REB during this time period. Based on these REB data, the most active rockburst areas were found to be in Poland, the Kola Peninsula in northern Russia, and South Africa; but rockburst areas in North America, Germany, Tajikistan, and Japan have also been investigated. Although the majority of these events had REB magnitudes in the range 3 is less than or equal to m(b) is less than or equal to 4, very few (n = 5) were "screened" by the nominal screening procedures at the PIDC. A somewhat larger number (n = 49) were "not-screened," but most were "not considered" or had "insufficient data" for screening. We have analyzed the PIDC screening results for these rockburst events in detail, and they indicate that teleseismic discrimination procedures are not likely to be effective for screening these rockburst sources. However, there does appear to be some evidence that regional signals recorded by IMS stations from events in these rockburst areas may have differences related to source type. Proceedings of the Annual DoD/DOE Seismic Research Symposium (22nd): Planning for Verification of and Compliance with the Comprehensive Nuclear-Test-Ban Treaty (CTBT) held in New Orleans, Louisiana on 13-15 September 2000. U.S. Government or Federal Rights. The original document contains color images. |
author2 |
MAXWELL TECHNOLOGIES INC SAN DIEGO CA |
format |
Text |
author |
Bennett, Theron J. Marshall, Margaret E. Cook, Ronald W. |
author_facet |
Bennett, Theron J. Marshall, Margaret E. Cook, Ronald W. |
author_sort |
Bennett, Theron J. |
title |
Regional Signal Characteristics for Use in Screening Seismic Events in Rockburst Areas |
title_short |
Regional Signal Characteristics for Use in Screening Seismic Events in Rockburst Areas |
title_full |
Regional Signal Characteristics for Use in Screening Seismic Events in Rockburst Areas |
title_fullStr |
Regional Signal Characteristics for Use in Screening Seismic Events in Rockburst Areas |
title_full_unstemmed |
Regional Signal Characteristics for Use in Screening Seismic Events in Rockburst Areas |
title_sort |
regional signal characteristics for use in screening seismic events in rockburst areas |
publishDate |
2000 |
url |
http://www.dtic.mil/docs/citations/ADA530002 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA530002 |
long_lat |
ENVELOPE(-60.667,-60.667,-63.950,-63.950) |
geographic |
Kola Peninsula Orleans |
geographic_facet |
Kola Peninsula Orleans |
genre |
kola peninsula |
genre_facet |
kola peninsula |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA530002 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766059344827252736 |