Co-Seismic Gravity Gradient Changes of the 2006–2007 Great Earthquakes in the Central Kuril Islands From Grace Observations

Rahimi, Armin; Shahrisvand, M.

doi:10.5194/isprs-archives-xlii-4-w4-517-2017

Cited by 1 publication

(2 citation statements)

References 7 publications

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“…To obtain the change rate of the EWH in the NETP, we fitted the monthly EWH anomalies by utilizing the following formula (Rahimi & Shahrisvand, 2017):

Δ H (θ, λ, t) = [a_{1} \cos (2 π t) + a_{2} \sin (2 π t)] + [b_{1} \cos (4 π t) + b_{2} \sin (4 π t)] + c t + d

where

a_{1}

and

a_{2}

are annual factors,

b_{1}

and

b_{2}

represent semiannual factors (

a_{1}

a_{2}

b_{1}

, and

b_{2}

reflect the effects of hydrology),

c

represents the annual EWH change rate, and d is a constant of the time series.…”

Section: Methodsmentioning

confidence: 99%

“…After preprocessing the GRACE data with P4M6 decorrelation filter and Gaussian smoothing methods, we calculated the time-variable equivalent water height (EWH) according to the following formula (Wahr et al, 1998): To obtain the change rate of the EWH in the NETP, we fitted the monthly EWH anomalies by utilizing the following formula (Rahimi & Shahrisvand, 2017):…”

Section: Satellite Gravity Datamentioning

confidence: 99%

See 1 more Smart Citation

Moho Changes Beneath the Northeastern Tibetan Plateau Revealed by Multiple Geodetic Datasets

Zhang

Shen

et al. 2021

JGR Solid Earth

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Summary The Moho interface depths and variations provide important references to understanding the outward growth and expansion mechanisms of the Tibetan Plateau, which have drawn much attention. Here, we constrain the Moho variations beneath the northeastern Tibetan Plateau (NETP) by using multiple geodetic data and climate models. Hydrological and tectonic gravitational signals are identified from multisource data and removed from the satellite gravity observations. Moreover, the mass variation rate, resulting from vertical Moho changes is calculated. The result shows that the mass variation rate due to the Moho changes is 1.3 ± 0.6 mm/yr (equivalent water height) within the NETP, which corresponds to a Moho uplift rate of 2.7 ± 1.3 mm/yr. Additionally, we calculate the tectonic Earth surface uplift rate from GPS and leveling observations with loading and GIA (glacier isostatic adjustment) influence corrected, which gives an uplift rate of 2.2 ± 0.1 mm/yr and is similar with the Moho uplift rate. Our results indicate that the crust in the NETP is uplifted with a slight decrease in crustal thickness. Combined with the lithospheric structure from seismological tomography studies, we suggest that the crustal uplift of the NETP is mainly caused by isostatic adjustment since the delamination of the thickened lithosphere.

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“…To obtain the change rate of the EWH in the NETP, we fitted the monthly EWH anomalies by utilizing the following formula (Rahimi & Shahrisvand, 2017):