Continuous Seismic Threshold Monitoring of the Northern Novaya Zemlya Test Site: Long-Term Operational Characteristics
In this work we demonstrate the practical capability of the Continuous Seismic Threshold Monitoring method to monitor the northern Novaya Zemlya test site at a very low threshold over an extended time period, using data from the Fennoscandian array network (NORESS, ARCESS and FINESA). We show that d...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1992
|
Subjects: | |
Online Access: | http://www.dtic.mil/docs/citations/ADA253273 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA253273 |
id |
ftdtic:ADA253273 |
---|---|
record_format |
openpolar |
spelling |
ftdtic:ADA253273 2023-05-15T15:02:13+02:00 Continuous Seismic Threshold Monitoring of the Northern Novaya Zemlya Test Site: Long-Term Operational Characteristics Kvaerna, T. NORWEGIAN SEISMIC ARRAY (NORSAR) KJELLER 1992-02-28 text/html http://www.dtic.mil/docs/citations/ADA253273 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA253273 en eng http://www.dtic.mil/docs/citations/ADA253273 Approved for public release; distribution is unlimited. DTIC AND NTIS Seismology Nuclear Weapons *SEISMIC DETECTION *SEISMIC ARRAYS USSR WEATHER MONITORING SEISMIC DATA NUCLEAR EXPLOSION DETECTION NORWAY FINLAND ARCTIC REGIONS TREATIES SIGNALS NUCLEAR EXPLOSION TESTING NETWORKS WIND SEISMIC THRESHOLD MONITORING NOVAYA ZEMLYA TEST SITE FENNOSCANDIAN REGIONAL ARRAY NETWORK NORESS(NORWEGIAN EXPERIMENTAL SMALL SUBARRAY) ARCESS(ARCTIC EXPERIMENTAL SMALL SUBARRAY) FINESA(FINNISH EXPERIMENTAL SEISMIC ARRAY) SBI1 FISCAL YEAR 92 PE62714E WUPL9A10DABH Text 1992 ftdtic 2016-02-22T13:54:37Z In this work we demonstrate the practical capability of the Continuous Seismic Threshold Monitoring method to monitor the northern Novaya Zemlya test site at a very low threshold over an extended time period, using data from the Fennoscandian array network (NORESS, ARCESS and FINESA). We show that during February 1992 the network based magnitude threshold, at the 90% confidence level, stays below msubb = 2.50,99.72% of the total time. We further explain all peaks in the network magnitude thresholds exceeding msubb = 2.6 as resulting from interfering signals from an identified seismic event (teleseismic or regional), or a short outage of the most important array (ARCESS). We also argue that this implies that at the given confidence level, there has been no seismic event of msubb > or = 2.6 at the northern Novaya Zemlya test site during February 1992. During normal conditions, i.e., when the network threshold is low, ARCESS is clearly the most important array, followed by NORESS and FINESA. But during time periods when the ARCESS noise level is high, or when there are interfering events, the relative contribution of NORESS and FINESA increases significantly. The redundancy resulting from the use of several arrays is also essential during outages of one or more of the arrays. The threshold magnitudes for each array during background noise conditions are close to normally distributed, at least within shorter time intervals. Small deviations from the normal distribution occur because of long-term fluctuations in the background noise level. The average magnitude thresholds at FINESA exhibit strong weekly and diurnal variations. The latter are particularly significant on workdays. Text Arctic Fennoscandian Novaya Zemlya Defense Technical Information Center: DTIC Technical Reports database Arctic Norway |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Seismology Nuclear Weapons *SEISMIC DETECTION *SEISMIC ARRAYS USSR WEATHER MONITORING SEISMIC DATA NUCLEAR EXPLOSION DETECTION NORWAY FINLAND ARCTIC REGIONS TREATIES SIGNALS NUCLEAR EXPLOSION TESTING NETWORKS WIND SEISMIC THRESHOLD MONITORING NOVAYA ZEMLYA TEST SITE FENNOSCANDIAN REGIONAL ARRAY NETWORK NORESS(NORWEGIAN EXPERIMENTAL SMALL SUBARRAY) ARCESS(ARCTIC EXPERIMENTAL SMALL SUBARRAY) FINESA(FINNISH EXPERIMENTAL SEISMIC ARRAY) SBI1 FISCAL YEAR 92 PE62714E WUPL9A10DABH |
spellingShingle |
Seismology Nuclear Weapons *SEISMIC DETECTION *SEISMIC ARRAYS USSR WEATHER MONITORING SEISMIC DATA NUCLEAR EXPLOSION DETECTION NORWAY FINLAND ARCTIC REGIONS TREATIES SIGNALS NUCLEAR EXPLOSION TESTING NETWORKS WIND SEISMIC THRESHOLD MONITORING NOVAYA ZEMLYA TEST SITE FENNOSCANDIAN REGIONAL ARRAY NETWORK NORESS(NORWEGIAN EXPERIMENTAL SMALL SUBARRAY) ARCESS(ARCTIC EXPERIMENTAL SMALL SUBARRAY) FINESA(FINNISH EXPERIMENTAL SEISMIC ARRAY) SBI1 FISCAL YEAR 92 PE62714E WUPL9A10DABH Kvaerna, T. Continuous Seismic Threshold Monitoring of the Northern Novaya Zemlya Test Site: Long-Term Operational Characteristics |
topic_facet |
Seismology Nuclear Weapons *SEISMIC DETECTION *SEISMIC ARRAYS USSR WEATHER MONITORING SEISMIC DATA NUCLEAR EXPLOSION DETECTION NORWAY FINLAND ARCTIC REGIONS TREATIES SIGNALS NUCLEAR EXPLOSION TESTING NETWORKS WIND SEISMIC THRESHOLD MONITORING NOVAYA ZEMLYA TEST SITE FENNOSCANDIAN REGIONAL ARRAY NETWORK NORESS(NORWEGIAN EXPERIMENTAL SMALL SUBARRAY) ARCESS(ARCTIC EXPERIMENTAL SMALL SUBARRAY) FINESA(FINNISH EXPERIMENTAL SEISMIC ARRAY) SBI1 FISCAL YEAR 92 PE62714E WUPL9A10DABH |
description |
In this work we demonstrate the practical capability of the Continuous Seismic Threshold Monitoring method to monitor the northern Novaya Zemlya test site at a very low threshold over an extended time period, using data from the Fennoscandian array network (NORESS, ARCESS and FINESA). We show that during February 1992 the network based magnitude threshold, at the 90% confidence level, stays below msubb = 2.50,99.72% of the total time. We further explain all peaks in the network magnitude thresholds exceeding msubb = 2.6 as resulting from interfering signals from an identified seismic event (teleseismic or regional), or a short outage of the most important array (ARCESS). We also argue that this implies that at the given confidence level, there has been no seismic event of msubb > or = 2.6 at the northern Novaya Zemlya test site during February 1992. During normal conditions, i.e., when the network threshold is low, ARCESS is clearly the most important array, followed by NORESS and FINESA. But during time periods when the ARCESS noise level is high, or when there are interfering events, the relative contribution of NORESS and FINESA increases significantly. The redundancy resulting from the use of several arrays is also essential during outages of one or more of the arrays. The threshold magnitudes for each array during background noise conditions are close to normally distributed, at least within shorter time intervals. Small deviations from the normal distribution occur because of long-term fluctuations in the background noise level. The average magnitude thresholds at FINESA exhibit strong weekly and diurnal variations. The latter are particularly significant on workdays. |
author2 |
NORWEGIAN SEISMIC ARRAY (NORSAR) KJELLER |
format |
Text |
author |
Kvaerna, T. |
author_facet |
Kvaerna, T. |
author_sort |
Kvaerna, T. |
title |
Continuous Seismic Threshold Monitoring of the Northern Novaya Zemlya Test Site: Long-Term Operational Characteristics |
title_short |
Continuous Seismic Threshold Monitoring of the Northern Novaya Zemlya Test Site: Long-Term Operational Characteristics |
title_full |
Continuous Seismic Threshold Monitoring of the Northern Novaya Zemlya Test Site: Long-Term Operational Characteristics |
title_fullStr |
Continuous Seismic Threshold Monitoring of the Northern Novaya Zemlya Test Site: Long-Term Operational Characteristics |
title_full_unstemmed |
Continuous Seismic Threshold Monitoring of the Northern Novaya Zemlya Test Site: Long-Term Operational Characteristics |
title_sort |
continuous seismic threshold monitoring of the northern novaya zemlya test site: long-term operational characteristics |
publishDate |
1992 |
url |
http://www.dtic.mil/docs/citations/ADA253273 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA253273 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Fennoscandian Novaya Zemlya |
genre_facet |
Arctic Fennoscandian Novaya Zemlya |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA253273 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766334186776428544 |