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Statements

Subject Item
n2:RIV%2F67985530%3A_____%2F12%3A00379890%21RIV13-AV0-67985530
rdf:type
skos:Concept n15:Vysledek
dcterms:description
Efforts to determine general moment tensors (MTs) for microearthquakes in volcanic areas are often hampered by small seismic networks, which can lead to poorly constrained hypocentres and inadequate modelling of seismic velocity heterogeneity. In addition, noisy seismic signals can make it difficult to identify phase arrivals correctly for small magnitude events. However, small volcanic earthquakes can have source mechanisms that deviate from brittle double-couple shear failure due to magmatic and/or hydrothermal processes. Thus, determining reliable MTs in such conditions is a challenging but potentially rewarding pursuit. We pursued such a goal at Okmok Volcano, Alaska, which erupted recently in 1997 and in 2008. The Alaska Volcano Observatory operates a seismic network of 12 stations at Okmok and routinely catalogues recorded seismicity. Efforts to determine general moment tensors (MTs) for microearthquakes in volcanic areas are often hampered by small seismic networks, which can lead to poorly constrained hypocentres and inadequate modelling of seismic velocity heterogeneity. In addition, noisy seismic signals can make it difficult to identify phase arrivals correctly for small magnitude events. However, small volcanic earthquakes can have source mechanisms that deviate from brittle double-couple shear failure due to magmatic and/or hydrothermal processes. Thus, determining reliable MTs in such conditions is a challenging but potentially rewarding pursuit. We pursued such a goal at Okmok Volcano, Alaska, which erupted recently in 1997 and in 2008. The Alaska Volcano Observatory operates a seismic network of 12 stations at Okmok and routinely catalogues recorded seismicity.
dcterms:title
Determination and uncertainty of moment tensors for microearthquakes at Okmok Volcano, Alaska Determination and uncertainty of moment tensors for microearthquakes at Okmok Volcano, Alaska
skos:prefLabel
Determination and uncertainty of moment tensors for microearthquakes at Okmok Volcano, Alaska Determination and uncertainty of moment tensors for microearthquakes at Okmok Volcano, Alaska
skos:notation
RIV/67985530:_____/12:00379890!RIV13-AV0-67985530
n15:predkladatel
n19:ico%3A67985530
n3:aktivita
n17:P n17:Z
n3:aktivity
P(GAP210/12/2235), Z(AV0Z30120515)
n3:cisloPeriodika
3
n3:dodaniDat
n13:2013
n3:domaciTvurceVysledku
n14:8874425
n3:druhVysledku
n12:J
n3:duvernostUdaju
n20:S
n3:entitaPredkladatele
n7:predkladatel
n3:idSjednocenehoVysledku
130551
n3:idVysledku
RIV/67985530:_____/12:00379890
n3:jazykVysledku
n10:eng
n3:klicovaSlova
earthquake source observations; volcano seismology; body waves
n3:klicoveSlovo
n6:body%20waves n6:volcano%20seismology n6:earthquake%20source%20observations
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[B49FE33825DE]
n3:nazevZdroje
Geophysical Journal International
n3:obor
n9:DC
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:projekt
n18:GAP210%2F12%2F2235
n3:rokUplatneniVysledku
n13:2012
n3:svazekPeriodika
190
n3:tvurceVysledku
Pesicek, J. D. Šílený, Jan Prejean, S. G. Thurber, C. H.
n3:wos
000307571100029
n3:zamer
n16:AV0Z30120515
s:issn
0956-540X
s:numberOfPages
21
n5:doi
10.1111/j.1365-246X.2012.05574.x