dc.contributor.author
Kwiatek, Grzegorz
dc.contributor.author
Ben-Zion, Yehuda
dc.date.accessioned
2021-01-25T07:51:33Z
dc.date.available
2021-01-25T07:51:33Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/29344
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-29090
dc.description.abstract
We investigate theoretical limits to detection of fast and slow seismic events, and spatial variations of ground motion expected from M 6 earthquakes at short epicentral distances. The analyses are based on synthetic velocity seismograms calculated with the discrete wavenumber method assuming seismic velocities and attenuation properties of the crust in Southern California. The examined source properties include different magnitudes (M -1.0 to M 6.0), static stress drops (0.1-10 MPa), and slow and fast ruptures (0.1-0.9 of shear wave velocity). For the M 6 events we also consider variations in rise times producing crack- and pulse-type events and different rupture directivities. Slow events produce ground motion with considerably lower amplitude than corresponding regular fast earthquakes with the same magnitude, and hence are significantly more difficult to detect. The static stress drop and slip rise time also affect the maximum radiated seismic motion, and hence event detectability. Apart from geometrical factors, the saturation and depletion of seismic ground motion at short epicentral distances stem from radiation pattern, earthquake size (magnitude, stress drop), and rupture directivity. The rupture velocity, rise time, and directivity affect significantly the spatial pattern of the ground motions. The results can help optimizing detection of slow and fast small earthquakes and understand the spatial distribution of ground motion generated by large events.
en
dc.format.extent
15 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
slow earthquakes
en
dc.subject
ground motions
en
dc.subject
earthquake detection
en
dc.subject
source parameters
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
Detection Limits and Near-Field Ground Motions of Fast and Slow Earthquakes
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
e2019JB018935
dcterms.bibliographicCitation.doi
10.1029/2019JB018935
dcterms.bibliographicCitation.journaltitle
Journal of Geophysical Research. Solid Earth
dcterms.bibliographicCitation.number
7
dcterms.bibliographicCitation.volume
125
dcterms.bibliographicCitation.url
https://doi.org/10.1029/2019JB018935
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften

refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2169-9356
refubium.resourceType.provider
WoS-Alert