Low-Frequency Marsquakes and Where to Find Them: Back Azimuth Determination Using a Polarization Analysis Approach
dc.contributor.author
Zenhäusern, Géraldine
dc.contributor.author
Stähler, Simon Christian
dc.contributor.author
Clinton, John Francis
dc.contributor.author
Giardini, Domenico
dc.contributor.author
Ceylan, Savas
dc.contributor.author
Garcia, Raphaël F.
dc.date.accessioned
2022-08-02T13:15:37Z
dc.date.available
2022-08-01T04:42:39Z
dc.date.available
2022-08-02T13:15:37Z
dc.date.issued
2022-08
dc.identifier.issn
0037-1106
dc.identifier.issn
1943-3573
dc.identifier.other
10.1785/0120220019
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/561061
dc.description.abstract
National Aeronautics and Space Administration’s Interior Exploration using Seismic Investigations, Geodesy, and Heat Transport (InSight) mission on Mars continues to record seismic data over 3 yr after landing, and over a thousand marsquakes have been identified, to date. With only a single seismic station, the determination of the epicentral location is far more challenging than on the Earth. The Marsquake Service (MQS) produces seismicity catalogs from data collected by InSight, and provides distance and back azimuth estimates when these can be reliably determined; when both are available, these are combined to provide a location. Currently, MQS does not assign a back azimuth to the vast majority of marsquakes. In this work we develop and apply a polarization analysis method to determine the back azimuth of seismic events from the polarization of observed P-and S-wave arrivals. The method is first applied to synthetic marsquakes and then calibrated using a set of well-located earthquakes that have been recorded in Tennant Creek, Australia. We find that the back azimuth is estimated reliably using our polarization method. The same approach is then used for a set of high-quality marsquakes recorded up to October 2021. We are able to estimate back azimuths for 24 marsquakes, 16 of these without MQS back azimuths. We locate most events to the east of InSight, in the general region of Cerberus Fossae.
en_US
dc.language.iso
en
en_US
dc.publisher
Seismological Society of America
en_US
dc.title
Low-Frequency Marsquakes and Where to Find Them: Back Azimuth Determination Using a Polarization Analysis Approach
en_US
dc.type
Journal Article
dc.date.published
2022-05-25
ethz.journal.title
Bulletin of the Seismological Society of America
ethz.journal.volume
112
en_US
ethz.journal.issue
4
en_US
ethz.journal.abbreviated
Bull. Seismo. Soc. Am.
ethz.pages.start
1787
en_US
ethz.pages.end
1805
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
El Cerrito, CA
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erd- und Planetenwissenschaften / Dep. of Earth and Planetary Sciences::02506 - Institut für Geophysik / Institute of Geophysics::03476 - Giardini, Domenico / Giardini, Domenico
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erd- und Planetenwissenschaften / Dep. of Earth and Planetary Sciences::02506 - Institut für Geophysik / Institute of Geophysics::03476 - Giardini, Domenico / Giardini, Domenico
ethz.date.deposited
2022-08-01T04:42:44Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2022-08-02T13:15:44Z
ethz.rosetta.lastUpdated
2023-02-07T04:59:07Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Low-Frequency%20Marsquakes%20and%20Where%20to%20Find%20Them:%20Back%20Azimuth%20Determination%20Using%20a%20Polarization%20Analysis%20Approach&rft.jtitle=Bulletin%20of%20the%20Seismological%20Society%20of%20America&rft.date=2022-08&rft.volume=112&rft.issue=4&rft.spage=1787&rft.epage=1805&rft.issn=0037-1106&1943-3573&rft.au=Zenh%C3%A4usern,%20G%C3%A9raldine&St%C3%A4hler,%20Simon%20Christian&Clinton,%20John%20Francis&Giardini,%20Domenico&Ceylan,%20Savas&rft.genre=article&rft_id=info:doi/10.1785/0120220019&
Files in this item
Files | Size | Format | Open in viewer |
---|---|---|---|
There are no files associated with this item. |
Publication type
-
Journal Article [132360]