Show simple item record

dc.contributor.author
Igel, Jonas K.H.
dc.contributor.author
Ermert, Laura A.
dc.contributor.author
Fichtner, Andreas
dc.date.accessioned
2021-08-02T11:09:27Z
dc.date.available
2021-06-03T09:50:42Z
dc.date.available
2021-06-03T10:29:05Z
dc.date.available
2021-08-02T11:09:27Z
dc.date.issued
2021-10
dc.identifier.issn
0956-540X
dc.identifier.issn
1365-246X
dc.identifier.other
10.1093/gji/ggab210
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/488185
dc.identifier.doi
10.3929/ethz-b-000488185
dc.description.abstract
Ambient noise cross-correlations can be used as self-consistent observables, opening novel possibilities for investigating ambient noise sources. To optimise the forward-modelling of global ambient noise cross-correlations for any given distribution of noise sources in the microseismic frequency range up to 0.2 Hz, we implement (i) pre-computed wavefields and (ii) spatially variable grids. This enables rapid inversions for microseismic noise sources based on finite-frequency source sensitivity kernels. We use this advancement to perform regional and global gradient-based iterative inversions of the logarithmic energy ratio in the causal and acausal branches of micro-seismic noise cross-correlations. Synthetic inversions show promising results, with good recovery of the main dominant noise sources of the target model. Data inversions for several consecutive days at the beginning of October 2019 demonstrate the capability of inverting for the spatio-temporal variations of the sources of secondary microseisms in the ocean. This paves the way for daily ambient noise source inversions which could help improve full-waveform ambient noise tomography and subsurface monitoring methods.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Oxford University Press (OUP)
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Geophysics
en_US
dc.subject
Seismology; Ambient seismic noise
en_US
dc.subject
Computational Seismology
en_US
dc.subject
Numerical modelling
en_US
dc.subject
waveform inversion
en_US
dc.title
Rapid finite-frequency microseismic noise source inversion at regional to global scales
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-05-28
ethz.journal.title
Geophysical Journal International
ethz.journal.volume
227
en_US
ethz.journal.issue
1
en_US
ethz.journal.abbreviated
Geophys. j. int.
ethz.pages.start
169
en_US
ethz.pages.end
183
en_US
ethz.size
26 p. accepted version
en_US
ethz.version.deposit
acceptedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02506 - Institut für Geophysik / Institute of Geophysics::03971 - Fichtner, Andreas / Fichtner, Andreas
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02506 - Institut für Geophysik / Institute of Geophysics::03971 - Fichtner, Andreas / Fichtner, Andreas
en_US
ethz.date.deposited
2021-06-03T09:50:48Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-08-02T11:09:33Z
ethz.rosetta.lastUpdated
2022-03-29T10:52:12Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Rapid%20finite-frequency%20microseismic%20noise%20source%20inversion%20at%20regional%20to%20global%20scales&rft.jtitle=Geophysical%20Journal%20International&rft.date=2021-10&rft.volume=227&rft.issue=1&rft.spage=169&rft.epage=183&rft.issn=0956-540X&1365-246X&rft.au=Igel,%20Jonas%20K.H.&Ermert,%20Laura%20A.&Fichtner,%20Andreas&rft.genre=article&rft_id=info:doi/10.1093/gji/ggab210&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record