On the extraction of co-seismic signal for the Kuril Island earthquakes using GRACE observations

Rahimi, Armin; Li, Jin; Naeeni, Mehdi Raoofian; Shahrisvand, M.; Fatolazadeh, Farzam

doi:10.1093/gji/ggy287

Cited by 6 publications

(1 citation statement)

References 36 publications

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“…During the GRACE mission period (2002-2017) several large earthquakes caused observable gravity change signals, which were detected by GRACE [20,21]. The co-and post-seismic effects have been well investigated with GRACE measurements combined with other observations such as Global Navigation Satellite System (GNSS) displacements, for the events including the 2004 Sumatra Mw9.1 [22], 2011 Tohoku-Oki Mw9.0 [23,24], 2010 Chile Mw8.8 [25], 2005 Nias (Sumatra) Mw8.6 [21,22], 2012 Sumatra Mw8.6 [26], 2007 Bengkulu (Sumatra) Mw8.5 [20,21], 2006 Kuril Islands Mw8.3 [27,28], and 2013 Okhotsk Sea Mw8.3 [29] earthquakes. Among these large earthquakes some have induced noticeable mass change signals, which are clearly captured in the global mass change (expressed in equivalent water height, EWH) trends from GRACE ( Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

Seismic Impact of Large Earthquakes on Estimating Global Mean Ocean Mass Change from GRACE

Tang

Chen

et al. 2020

Remote Sensing

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We analyze the impact of large earthquakes on the estimation of the global mean ocean mass (GMOM) change rate over the 13-year period (January 2003 to December 2015) using the Gravity Recovery and Climate Experiment (GRACE) Release-06 (RL06) monthly gravity solutions released by the Center for Space Research (CSR). We take into account the effects of the December 2004 Mw9.1 and April 2012 Mw8.6 Sumatra earthquakes, the March 2011 Mw9.0 Tohoku-Oki earthquake, and the February 2010 Mw8.8 Chile earthquake. After removing the co- and post-seismic effects of these earthquakes in the oceanic areas by least squares fitting, we estimate the GMOM rate from GRACE monthly observations. Results show that GRACE-observed GMOM rate before the seismic correction is 2.12 ± 0.30 mm/year, while after correction the rate is 2.05 ± 0.30 mm/year. Even though the −0.07 ± 0.02 mm/year seismic influence on GRACE GMOM rate is small on a global scale, it is a systematic bias and should be considered for improved quantification and understanding of the global sea level change.

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Section: Introductionmentioning

confidence: 99%

Seismic Impact of Large Earthquakes on Estimating Global Mean Ocean Mass Change from GRACE

Tang

Chen

et al. 2020

Remote Sensing

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Evaluation of gravitational anomalies in the areas of strongest earthquakes based on GRACE satellite measurements

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Simonov

Matsulev

et al. 2019

Procedia Computer Science

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Multiple-data-based monthly geopotential model set LDCmgm90

et al. 2019

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While the GRACE (Gravity Recovery and Climate Experiment) satellite mission is of great significance in understanding various branches of Earth sciences, the quality of GRACE monthly products can be unsatisfactory due to strong longitudinal stripe-pattern errors and other flaws. Based on corrected GRACE Mascon (mass concentration) gridded mass transport time series and updated LDCgam (Least Difference Combination global angular momenta) data, we present a new set of monthly gravity models called LDCmgm90, in the form of Stokes coefficients with order and degree both up to 90. The LDCgam inputs are developed by assimilating degree-2 Stokes coefficients from various versions of GRACE (including Mascon products) and SLR (Satellite Laser Ranging) monthly gravity data into combinations of outputs from various global atmospheric, oceanic, and hydrological circulation models, under the constraints of accurately measured Earth orientation parameters in the Least Difference Combination (LDC) scheme. Taking advantages of the relative strengths of the various input solutions, the LDCmgm90 is free of stripes and some other flaws of classical GRACE products.

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On the extraction of co-seismic signal for the Kuril Island earthquakes using GRACE observations

Cited by 6 publications

References 36 publications

Seismic Impact of Large Earthquakes on Estimating Global Mean Ocean Mass Change from GRACE

Seismic Impact of Large Earthquakes on Estimating Global Mean Ocean Mass Change from GRACE

Evaluation of gravitational anomalies in the areas of strongest earthquakes based on GRACE satellite measurements

Multiple-data-based monthly geopotential model set LDCmgm90

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