Local seismic network for monitoring of a potential nuclear power plant area

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dc.contributor.author Tiira, Timo Ensio
dc.contributor.author Uski, Marja Riitta
dc.contributor.author Kortström, Jari Tapio
dc.contributor.author Kaisko, Outi Sinikka
dc.contributor.author Korja, Annakaisa
dc.date.accessioned 2016-07-15T10:00:01Z
dc.date.available 2016-07-15T10:00:01Z
dc.date.issued 2016-04
dc.identifier.citation Tiira , T E , Uski , M R , Kortström , J T , Kaisko , O S & Korja , A 2016 , ' Local seismic network for monitoring of a potential nuclear power plant area ' , Journal of Seismology , vol. 20 , no. 2 , pp. 397-417 . https://doi.org/10.1007/s10950-015-9534-8
dc.identifier.other PURE: 57523074
dc.identifier.other PURE UUID: 40195221-e9db-41bc-9495-eb068e3bc22b
dc.identifier.other Scopus: 84946429942
dc.identifier.other WOS: 000372124500001
dc.identifier.other ORCID: /0000-0001-9447-6146/work/29108376
dc.identifier.other ORCID: /0000-0001-9211-8273/work/29187720
dc.identifier.other ORCID: /0000-0001-8940-9248/work/29390750
dc.identifier.uri http://hdl.handle.net/10138/164756
dc.description.abstract This study presents a plan for seismic monitoring of a region around a potential nuclear power plant. Seismic monitoring is needed to evaluate seismic risk. The International Atomic Energy Agency has set guidelines on seismic hazard evaluation and monitoring of such areas. According to these guidelines, we have made a plan for a local network of seismic stations to collect data for seismic source characterization and seismotectonic interpretations, as well as to monitor seismic activity and natural hazards. The detection and location capability of the network were simulated using different station configurations by computing spatial azimuthal coverages and detection threshold magnitudes. Background noise conditions around Pyhäjoki were analyzed by comparing data from different stations. The annual number of microearthquakes that should be detected with a dense local network centered around Pyhäjoki was estimated. The network should be dense enough to fulfill the requirements of azimuthal coverage better than 180° and automatic event location capability down to ML ∼ 0 within a distance of 25 km from the site. A network of 10 stations should be enough to reach these goals. With this setup, the detection threshold magnitudes are estimated to be ML = −0.1 and ML = 0.1 within a radius of 25 and 50 km from Pyhäjoki, respectively. The annual number of earthquakes detected by the network is estimated to be 2 (ML ≥ ∼ −0.1) within 25 km radius and 5 (ML ≥ ∼−0.1 to ∼0.1) within 50 km radius. The location accuracy within 25 km radius is estimated to be 1–2 and 4 km for horizontal coordinates and depth, respectively. Thus, the network is dense enough to map out capable faults with horizontal accuracy of 1–2 km within 25 km radius of the site. The estimation is based on the location accuracies of five existing networks in northern Europe. Local factors, such as seismic noise sources, geology and infrastructure might limit the station configuration and detection and location capability of the network. fi
dc.description.abstract This study presents a plan for seismic monitoring of a region around a potential nuclear power plant. Seismic monitoring is needed to evaluate seismic risk. The International Atomic Energy Agency has set guidelines on seismic hazard evaluation and monitoring of such areas. According to these guidelines, we have made a plan for a local network of seismic stations to collect data for seismic source characterization and seismotectonic interpretations, as well as to monitor seismic activity and natural hazards. The detection and location capability of the network were simulated using different station configurations by computing spatial azimuthal coverages and detection threshold magnitudes. Background noise conditions around Pyhäjoki were analyzed by comparing data from different stations. The annual number of microearthquakes that should be detected with a dense local network centered around Pyhäjoki was estimated. The network should be dense enough to fulfill the requirements of azimuthal coverage better than 180° and automatic event location capability down to ML ∼ 0 within a distance of 25 km from the site. A network of 10 stations should be enough to reach these goals. With this setup, the detection threshold magnitudes are estimated to be ML = −0.1 and ML = 0.1 within a radius of 25 and 50 km from Pyhäjoki, respectively. The annual number of earthquakes detected by the network is estimated to be 2 (ML ≥ ∼ −0.1) within 25 km radius and 5 (ML ≥ ∼−0.1 to ∼0.1) within 50 km radius. The location accuracy within 25 km radius is estimated to be 1–2 and 4 km for horizontal coordinates and depth, respectively. Thus, the network is dense enough to map out capable faults with horizontal accuracy of 1–2 km within 25 km radius of the site. The estimation is based on the location accuracies of five existing networks in northern Europe. Local factors, such as seismic noise sources, geology and infrastructure might limit the station configuration and detection and location capability of the network. en
dc.format.extent 21
dc.language.iso eng
dc.relation.ispartof Journal of Seismology
dc.rights unspecified
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 1171 Geosciences
dc.title Local seismic network for monitoring of a potential nuclear power plant area en
dc.type Article
dc.contributor.organization Department of Geosciences and Geography
dc.contributor.organization Institute of Seismology
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1007/s10950-015-9534-8
dc.relation.issn 1383-4649
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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