Seismic Surveillance. Nuclear Test Ban Verification
The research can be divided into three main topics: (1) robust seismic event location schemes; (2) crustal structure mapping; and (3) teleseismic P- coda scattering analysis. New techniques are presented for fast and robust event location. In case of available arrival times from a network of seismog...
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ftdtic:ADA221768 2023-05-15T16:12:07+02:00 Seismic Surveillance. Nuclear Test Ban Verification Husebye, Eystein S. Ruud, Bent O. OSLO UNIV (NORWAY) DEPT OF GEOLOGY 1990-02-26 text/html http://www.dtic.mil/docs/citations/ADA221768 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA221768 en eng http://www.dtic.mil/docs/citations/ADA221768 Approved for public release; distribution is unlimited. DTIC AND NTIS Seismic Detection and Detectors *SEISMIC SIGNATURES *NUCLEAR EXPLOSION DETECTION SPHERES LONG RANGE(DISTANCE) ERRORS EARTH CRUST SEISMIC WAVES PARTS MAPPING HYPOTHESES RANGE(DISTANCE) ARRIVAL AZIMUTH SURVEILLANCE SEISMOLOGY TRAVEL TIME FITTINGS SEISMOGRAPHS NORTHERN EUROPE NETWORKS STRUCTURES NORESS SEISMIC ARRAY ARCESS SEISMIC ARRAY FINESA SEISMIC ARRAY SEISMIC DISCRIMINATION PE61101E WUGL9A10DAAE Text 1990 ftdtic 2016-02-23T01:54:30Z The research can be divided into three main topics: (1) robust seismic event location schemes; (2) crustal structure mapping; and (3) teleseismic P- coda scattering analysis. New techniques are presented for fast and robust event location. In case of available arrival times from a network of seismograph network (aperture up to 10-15 deg) a variant of Geiger's method for fitting arrival times to travel time tables, gave average location errors less than 1 deg in the teleseismic distance range. In another study, the location schemes are tied to the slowness vector as easily derived from arrays and 3-component stations, namely azimuth error minimization and slowness vector summation on a sphere for N arbitrary positioned stations. Crustal structures are managed for various parts of Fennoscandia where the 3 seismic arrays NORESS, ARCESS and FINESA are sited. NORESS P-wave coda of 75 s duration from 8 teleseismic events of widely different azimuths have been examined using both array and 3C analysis techniques. Although source-end scattering could not be separated from the source pulse per se, favor the hypothesis of long source duration is supported by observed slow beam amplitude decay rates. The majority of receiver-end scattering contributions appears to be P-to-Rg conversions in both forward and backward modes from two nearby areas with pronounced/topographic reliefs. (JHD) Text Fennoscandia Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Seismic Detection and Detectors *SEISMIC SIGNATURES *NUCLEAR EXPLOSION DETECTION SPHERES LONG RANGE(DISTANCE) ERRORS EARTH CRUST SEISMIC WAVES PARTS MAPPING HYPOTHESES RANGE(DISTANCE) ARRIVAL AZIMUTH SURVEILLANCE SEISMOLOGY TRAVEL TIME FITTINGS SEISMOGRAPHS NORTHERN EUROPE NETWORKS STRUCTURES NORESS SEISMIC ARRAY ARCESS SEISMIC ARRAY FINESA SEISMIC ARRAY SEISMIC DISCRIMINATION PE61101E WUGL9A10DAAE |
spellingShingle |
Seismic Detection and Detectors *SEISMIC SIGNATURES *NUCLEAR EXPLOSION DETECTION SPHERES LONG RANGE(DISTANCE) ERRORS EARTH CRUST SEISMIC WAVES PARTS MAPPING HYPOTHESES RANGE(DISTANCE) ARRIVAL AZIMUTH SURVEILLANCE SEISMOLOGY TRAVEL TIME FITTINGS SEISMOGRAPHS NORTHERN EUROPE NETWORKS STRUCTURES NORESS SEISMIC ARRAY ARCESS SEISMIC ARRAY FINESA SEISMIC ARRAY SEISMIC DISCRIMINATION PE61101E WUGL9A10DAAE Husebye, Eystein S. Ruud, Bent O. Seismic Surveillance. Nuclear Test Ban Verification |
topic_facet |
Seismic Detection and Detectors *SEISMIC SIGNATURES *NUCLEAR EXPLOSION DETECTION SPHERES LONG RANGE(DISTANCE) ERRORS EARTH CRUST SEISMIC WAVES PARTS MAPPING HYPOTHESES RANGE(DISTANCE) ARRIVAL AZIMUTH SURVEILLANCE SEISMOLOGY TRAVEL TIME FITTINGS SEISMOGRAPHS NORTHERN EUROPE NETWORKS STRUCTURES NORESS SEISMIC ARRAY ARCESS SEISMIC ARRAY FINESA SEISMIC ARRAY SEISMIC DISCRIMINATION PE61101E WUGL9A10DAAE |
description |
The research can be divided into three main topics: (1) robust seismic event location schemes; (2) crustal structure mapping; and (3) teleseismic P- coda scattering analysis. New techniques are presented for fast and robust event location. In case of available arrival times from a network of seismograph network (aperture up to 10-15 deg) a variant of Geiger's method for fitting arrival times to travel time tables, gave average location errors less than 1 deg in the teleseismic distance range. In another study, the location schemes are tied to the slowness vector as easily derived from arrays and 3-component stations, namely azimuth error minimization and slowness vector summation on a sphere for N arbitrary positioned stations. Crustal structures are managed for various parts of Fennoscandia where the 3 seismic arrays NORESS, ARCESS and FINESA are sited. NORESS P-wave coda of 75 s duration from 8 teleseismic events of widely different azimuths have been examined using both array and 3C analysis techniques. Although source-end scattering could not be separated from the source pulse per se, favor the hypothesis of long source duration is supported by observed slow beam amplitude decay rates. The majority of receiver-end scattering contributions appears to be P-to-Rg conversions in both forward and backward modes from two nearby areas with pronounced/topographic reliefs. (JHD) |
author2 |
OSLO UNIV (NORWAY) DEPT OF GEOLOGY |
format |
Text |
author |
Husebye, Eystein S. Ruud, Bent O. |
author_facet |
Husebye, Eystein S. Ruud, Bent O. |
author_sort |
Husebye, Eystein S. |
title |
Seismic Surveillance. Nuclear Test Ban Verification |
title_short |
Seismic Surveillance. Nuclear Test Ban Verification |
title_full |
Seismic Surveillance. Nuclear Test Ban Verification |
title_fullStr |
Seismic Surveillance. Nuclear Test Ban Verification |
title_full_unstemmed |
Seismic Surveillance. Nuclear Test Ban Verification |
title_sort |
seismic surveillance. nuclear test ban verification |
publishDate |
1990 |
url |
http://www.dtic.mil/docs/citations/ADA221768 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA221768 |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA221768 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1765997357310148608 |