We examine a 24-hour period of active San Andreas Fault (SAF) tremor
and show that this tremor is largely composed of repeated similar
events. Utilizing this similarity, we locate the subset of the tremor
with waveforms similar to an identified low frequency earthquake
(LFE) 'master template', located using P and S wave arrivals to be
\~26 km deep. To compensate for low signal-to-noise, we estimate
event-pair differential times at 'clusters' of nearby stations rather
than at single stations. We find that the locations form a near-linear
structure in map view, striking parallel to the SAF and near the
surface trace. Therefore, we suggest that at least a portion of the
tremor occurs on the deep extension of the fault, likely reflecting
shear slip, similar to subduction zone tremor. If so, the SAF may
extend to the base of the crust, \~10 km below the deepest regular
earthquakes on the fault.
%0 Journal Article
%1 shelly_etal:2009
%A Shelly, David R.
%A Ellsworth, William L.
%A Ryberg, Trond
%A Haberland, Christian
%A Fuis, Gary S.
%A Murphy, Janice
%A Nadeau, Robert M.
%A Bürgmann, Roland
%D 2009
%J Geophysical Research Letters
%K geophysics seismology
%N 1
%P L01303+
%R 10.1029/2008GL036367
%T Precise location of San Andreas Fault tremors near Cholame, California
using seismometer clusters: Slip on the deep extension of the fault?
%U http://dx.doi.org/10.1029/2008GL036367
%V 36
%X We examine a 24-hour period of active San Andreas Fault (SAF) tremor
and show that this tremor is largely composed of repeated similar
events. Utilizing this similarity, we locate the subset of the tremor
with waveforms similar to an identified low frequency earthquake
(LFE) 'master template', located using P and S wave arrivals to be
\~26 km deep. To compensate for low signal-to-noise, we estimate
event-pair differential times at 'clusters' of nearby stations rather
than at single stations. We find that the locations form a near-linear
structure in map view, striking parallel to the SAF and near the
surface trace. Therefore, we suggest that at least a portion of the
tremor occurs on the deep extension of the fault, likely reflecting
shear slip, similar to subduction zone tremor. If so, the SAF may
extend to the base of the crust, \~10 km below the deepest regular
earthquakes on the fault.
@article{shelly_etal:2009,
abstract = {We examine a 24-hour period of active San Andreas Fault (SAF) tremor
and show that this tremor is largely composed of repeated similar
events. Utilizing this similarity, we locate the subset of the tremor
with waveforms similar to an identified low frequency earthquake
(LFE) 'master template', located using P and S wave arrivals to be
\~{}26 km deep. To compensate for low signal-to-noise, we estimate
event-pair differential times at 'clusters' of nearby stations rather
than at single stations. We find that the locations form a near-linear
structure in map view, striking parallel to the SAF and near the
surface trace. Therefore, we suggest that at least a portion of the
tremor occurs on the deep extension of the fault, likely reflecting
shear slip, similar to subduction zone tremor. If so, the SAF may
extend to the base of the crust, \~{}10 km below the deepest regular
earthquakes on the fault.},
added-at = {2012-09-01T13:08:21.000+0200},
author = {Shelly, David R. and Ellsworth, William L. and Ryberg, Trond and Haberland, Christian and Fuis, Gary S. and Murphy, Janice and Nadeau, Robert M. and B\"{u}rgmann, Roland},
biburl = {https://www.bibsonomy.org/bibtex/25e6e40a4b18e8ef217eccc8c55d1a427/nilsma},
day = 06,
doi = {10.1029/2008GL036367},
interhash = {4fdd36107f613cefddd2e6a9f66a6330},
intrahash = {5e6e40a4b18e8ef217eccc8c55d1a427},
issn = {0094-8276},
journal = {Geophysical Research Letters},
keywords = {geophysics seismology},
month = jan,
number = 1,
pages = {L01303+},
timestamp = {2021-02-09T13:21:44.000+0100},
title = {Precise location of San Andreas Fault tremors near Cholame, California
using seismometer clusters: Slip on the deep extension of the fault?},
url = {http://dx.doi.org/10.1029/2008GL036367},
volume = 36,
year = 2009
}