Probing the Poisson's ratio of poroelastic rebound following the 2011 Mw 9.0 Tohoku earthquake

Panuntun, Hidayat; Miyazaki, S.; Orihara, Yoshiaki

doi:10.1093/gji/ggy403

Cited by 15 publications

(11 citation statements)

References 70 publications

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“…While some studies of postseismic surface deformation have evaluated poroelastic effects (Albano et al, 2017;Hu et al, 2014;Jonsson et al, 2003;Peltzer et al, 1998;Panuntun et al, 2018) Geodetic measurements of surface deformation have captured changes in deformation rate in the hours, weeks, and years following a number of major earthquake (Beavan et al, 2012;Gunawan et al, 2014;Hu et al, 2014;Johanson et al, 2006;Malservisi et al, 2015). Separating out postseismic processes from one another is a key component in understanding where and how stress is transferred after large earthquakes (Hughes et al, 2010;Segall, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…While some studies of postseismic surface deformation have evaluated poroelastic effects (Albano et al, ; Hu et al, ; Jonsson et al, ; Peltzer et al, ; Panuntun et al, ), none have explicitly evaluated to time‐dependent three‐dimensional behavior of poroelastic rebound and its effect on afterslip estimates. To best capture the spatial and temporal extent of the poroelastic response, high‐rate well level data across the study area is needed.…”

Section: Introductionmentioning

confidence: 99%

“…When poroelasticity has been considered either as a mechanism for coseismic well head changes or as a postseismic deformation mechanism, it is usually done so with linear elastic models (Fialko, ; Hu et al, ; Jonsson et al, ; Peltzer et al, ; Panuntun et al, ). In the case of calculating coseismic well head response due to static strain, the instantaneous volumetric strain produced by the earthquake is calculated with an undrained elastic model.…”

Section: Introductionmentioning

confidence: 99%

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Modeling the Contribution of Poroelastic Deformation to Postseismic Geodetic Signals

McCormack

Hesse

Dixon

et al. 2020

Geophysical Research Letters

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To constrain the poroelastic component of postseismic deformation, we model the subsurface hydrologic response to the M w 7.6 subduction zone earthquake that occurred on the plate interface beneath the Nicoya peninsula in Costa Rica on 5 September 2012. The model shows that poroelastic relaxation occurs on multiple time scales and the associated deformation can be up to 2 cm for the trench-perpendicular component. By modeling the time-dependent deformation associated with poroelastic relaxation, we can begin to remove its contribution from the observed geodetic signal. Inversions for after slip that ignore poroelastic deformation have errors of 10-20% overall and up to 50% locally. Poroelastic effects can both mute and amplify the inferred afterslip.Plain Language Summary Large earthquakes can affect regional groundwater pressures.This sets up large-scale groundwater movements that in turn lead to observable surface deformation. Accounting for these deformations is important during interpretation of GPS signals after large earthquakes. These measurements are often used to infer ongoing deformation on the fault. We show that if these calculations do not account for deformation due to groundwater flow, this can lead to errors of up to 40%. evaluated to time-dependent three-dimensional behavior of poroelastic rebound and its effect on afterslip estimates. To best capture the spatial and temporal extent of the poroelastic response, high-rate well level data across the study area is needed. Alternatively, we can use models based on well-known physical parameters to get a first-order approximation of this response.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling the Contribution of Poroelastic Deformation to Postseismic Geodetic Signals

McCormack

Hesse

Dixon

et al. 2020

Geophysical Research Letters

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“…The associated poroelastic rebound can cause time‐dependent surface deformation (Peltzer et al., 1996, 1998). Poroelastic rebound models have been applied to study crustal deformation associated with subduction zone earthquakes, such as the 2004 Sumatra earthquake (Hughes et al., 2010) and the 2011 Tohoku earthquake (Hu et al., 2014; Panuntun et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…The associated poroelastic rebound can cause time-dependent surface deformation (Peltzer et al, 1996(Peltzer et al, , 1998. Poroelastic rebound models have been applied to study crustal deformation associated with subduction zone earthquakes, such as the 2004 Sumatra earthquake (Hughes et al, 2010) and the 2011 Tohoku earthquake (Hu et al, 2014;Panuntun et al, 2018). We adopted the PEGRN/PECMP codes (R. Wang & Küumpel, 2003) to explore the effects of poroelastic rebound on the Gorkha postseismic deformation, using our coseismic slip model (Figure 4).…”

Section: Impact Of Poroelastic Reboundmentioning

confidence: 99%

Postseismic Deformation and Afterslip Evolution of the 2015 Gorkha Earthquake Constrained by InSAR and GPS Observations

Hong

Liu

2021

JGR Solid Earth

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The 2015 Gorkha, Nepal, earthquake ruptured a segment of the Main Frontal Thrust (MFT) along the central Himalaya arc, the convergent boundary between the Indian and Eurasian plates. The mainshock (M W 7.8) and the largest aftershock (M W 7.3) occurred on April 25, 2015 and May 12, 2015, respectively. Studies shortly after the earthquakes focused on coseismic slip and its impact on earthquake risks in the region. Most models have suggested that both earthquakes were thrust-type ruptures along a low-angle fault plane (G.

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Geodetic slip model of the November 26, 2019 Albania earthquake estimated from Sentinel-1 TOPS interferometry

Panuntun

2021

Tectonophysics

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Probing the Poisson's ratio of poroelastic rebound following the 2011 Mw 9.0 Tohoku earthquake

Cited by 15 publications

References 70 publications

Modeling the Contribution of Poroelastic Deformation to Postseismic Geodetic Signals

Modeling the Contribution of Poroelastic Deformation to Postseismic Geodetic Signals

Postseismic Deformation and Afterslip Evolution of the 2015 Gorkha Earthquake Constrained by InSAR and GPS Observations

Geodetic slip model of the November 26, 2019 Albania earthquake estimated from Sentinel-1 TOPS interferometry

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