Thu Apr 10, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Zhang, Guoqing, Shen, Wenbin, Xu, Changyi, and Zhu, Yiqing, 2016. Coseismic Gravity and Displacement Signatures Induced by the 2013 Okhotsk Mw8.3 Earthquake. Sensors, 16(9):1410, doi:10.3390/s16091410.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2016Senso..16.1410Z,
author = {{Zhang}, Guoqing and {Shen}, Wenbin and {Xu}, Changyi and {Zhu}, Yiqing},
title = "{Coseismic Gravity and Displacement Signatures Induced by the 2013 Okhotsk Mw8.3 Earthquake}",
journal = {Sensors},
keywords = {Okhotsk Mw8.3 earthquake, GRACE, dislocation theory, coseismic gravity changes, coseismic displacements},
year = 2016,
month = sep,
volume = {16},
number = {9},
eid = {1410},
pages = {1410},
abstract = "{In this study, Gravity Recovery and Climate Experiment (GRACE) RL05 data
from January 2003 to October 2014 were used to extract the
coseismic gravity changes induced by the 24 May 2013 Okhotsk
Mw8.3 deep-focus earthquake using the difference and least
square fitting methods. The gravity changes obtained from GRACE
data agreed well with those from dislocation theory in both
magnitude and spatial pattern. Positive and negative gravity
changes appeared on both sides of the epicenter. The positive
signature appeared on the western side, and the peak value was
approximately 0.4 microgal (1 microgal = 10$^{-8}$ m/s$^{2}$),
whereas on the eastern side, the gravity signature was negative,
and the peak value was approximately -1.1 microgal. It
demonstrates that deep-focus earthquakes Mw {\ensuremath{\leq}}
8.5 are detectable by GRACE observations. Moreover, the
coseismic displacements of 20 Global Positioning System (GPS)
stations on the Earth's surface were simulated using an elastic
dislocation theory in a spherical earth model, and the results
are consistent with the GPS results, especially the near-field
results. We also estimated the gravity contributions from the
coseismic vertical displacements and density changes, analyzed
the proportion of these two gravity change factors (based on an
elastic dislocation theory in a spherical earth model) in this
deep-focus earthquake. The gravity effect from vertical
displacement is four times larger than that caused by density
redistribution.}",
doi = {10.3390/s16091410},
adsurl = {https://ui.adsabs.harvard.edu/abs/2016Senso..16.1410Z},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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