Observing coseismic gravity change from the Japan Tohoku‐Oki 2011 earthquake with GOCE gravity gradiometry

Fuchs, M; Bouman, J; Broerse, Taco; Visser, Pieter; Vermeersen, Bert

doi:10.1002/jgrb.50381

Cited by 47 publications

(49 citation statements)

References 35 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Classical gravitational potential theory demands that: V XX + V YY + V ZZ = 0. This allows us to compute a combined

V_{C, Z Z}^{\in} = ((), - V_{X X}^{\in} - V_{Y Y}^{\in} + V_{Z Z}^{\in}) true/ 2

, which has an error that is approximately 40% less than that of the original

V_{Z Z}^{\in}

[ Fuchs et al ., ]. Close to the magnetic poles

V_{Y Y}^{\in}

, and hence the combined

V_{C, Z Z}^{\in}

gravity gradients, are contaminated with spurious signal from thermospheric winds [ Peterseim et al ., ].…”

Section: Methodsmentioning

confidence: 99%

Antarctic outlet glacier mass change resolved at basin scale from satellite gravity gradiometry

Bouman¹,

Fuchs²,

Ivins

et al. 2014

Geophysical Research Letters

View full text Add to dashboard Cite

The orbit and instrumental measurement of the Gravity Field and Steady State Ocean Circulation Explorer (GOCE) satellite mission offer the highest ever resolution capabilities for mapping Earth's gravity field from space. However, past analysis predicted that GOCE would not detect changes in ice sheet mass. Here we demonstrate that GOCE gravity gradiometry observations can be combined with Gravity Recovery and Climate Experiment (GRACE) gravity data to estimate mass changes in the Amundsen Sea Sector. This refined resolution allows land ice changes within the Pine Island Glacier (PIG), Thwaites Glacier, and Getz Ice Shelf drainage systems to be measured at respectively −67 ± 7, −63 ± 12, and −55 ± 9 Gt/yr over the GOCE observing period of November 2009 to June 2012. This is the most accurate pure satellite gravimetry measurement to date of current mass loss from PIG, known as the “weak underbelly” of West Antarctica because of its retrograde bed slope and high potential for raising future sea level.

show abstract

“…Classical gravitational potential theory demands that: V XX + V YY + V ZZ = 0. This allows us to compute a combined

V_{C, Z Z}^{\in} = ((), - V_{X X}^{\in} - V_{Y Y}^{\in} + V_{Z Z}^{\in}) true/ 2

, which has an error that is approximately 40% less than that of the original

V_{Z Z}^{\in}

[ Fuchs et al ., ]. Close to the magnetic poles

V_{Y Y}^{\in}

, and hence the combined

V_{C, Z Z}^{\in}

gravity gradients, are contaminated with spurious signal from thermospheric winds [ Peterseim et al ., ].…”

Section: Methodsmentioning

confidence: 99%

Antarctic outlet glacier mass change resolved at basin scale from satellite gravity gradiometry

Bouman¹,

Fuchs²,

Ivins

et al. 2014

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…This mass redistribution induces changes in the Earth's gravitational field. Permanent gravity changes generated by static deformation induced by the co-seismic and post-seismic slip of large earthquakes have been observed by superconducting gravimeters and gravity field satellite missions on multiple occasions (Imanishi et al 2004;Wang et al 2012a;Fuchs et al 2013;Cambiotti & Sabadini 2013). Theoretical models of these static gravity perturbations have been developed (Okubo 1992;Sun et al 2009) and compared to observations (Matsuo & Heki 2011;Wang et al 2012b).…”

Section: Introductionmentioning

confidence: 99%

Transient gravity perturbations induced by earthquake rupture

Harms

Ampuero

Barsuglia

et al. 2015

Geophysical Journal International

View full text Add to dashboard Cite

S U M M A R YThe static and transient deformations produced by earthquakes cause density perturbations which, in turn, generate immediate, long-range perturbations of the Earth's gravity field. Here, an analytical solution is derived for gravity perturbations produced by a point double-couple source in homogeneous, infinite, non-self-gravitating elastic media. The solution features transient gravity perturbations that occur at any distance from the source between the rupture onset time and the arrival time of seismic P waves, which are of potential interest for real-time earthquake source studies and early warning. An analytical solution for such prompt gravity perturbations is presented in compact form. We show that it approximates adequately the prompt gravity perturbations generated by strike-slip and dip-slip finite fault ruptures in a half-space obtained by numerical simulations based on the spectral element method. Based on the analytical solution, we estimate that the observability of prompt gravity perturbations within 10 s after rupture onset by current instruments is severely challenged by the background microseism noise but may be achieved by high-precision gravity strainmeters currently under development. Our analytical results facilitate parametric studies of the expected prompt gravity signals that could be recorded by gravity strainmeters.

show abstract

“…On the Moon, gravity gradients reconstructed from the Gravity Recovery and Interior Laboratory gravity fields have evidenced elongated anomalies attributed to magmatic intrusions (Andrews‐Hanna et al, ). In the same way, a precise delineation of local to regional gravity variations associated to earthquakes has been obtained from reconstructions of time‐varying gravity gradients from Gravity Recovery and Climate Experiment (Dai et al, ; Fuchs et al, ; Panet et al, ). The differentiations involved in the definition of gravity gradients indeed leads to a high sensitivity to the spatial pattern of the gravity signals, especially for north‐south or east‐west aligned sources: These are originated at the larger scales of the mantle main structure, down to those of a local coastline concentrating ice depletion signals (Bouman et al, ).…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Gravitational Gradients in Rotated Frames and Their Relation to Oriented Mass Sources

Panet

2018

JGR Solid Earth

View full text Add to dashboard Cite

Many mass sources within the Earth and its fluid envelopes show elongated geometries, aligning with the orientations of plate boundaries and plate motions, coastlines, rivers, and drainage basins for instance. To enhance their identification and separation in global or regional gravity observations and models, a dedicated method based on gravitational gradients analysis is presented here. This approach provides a detailed description of the geographic pattern of the gravity variations, which are accurately mapped thanks to the regular spatial coverage of high‐accuracy satellite data and arise from lateral density changes within the planet. First, gravity gradients are defined at different spatial scales in spherical frames, which are rotated along the radial axis according to the orientation of the source. The sensitivity of these gradients to the mass distribution inside a spherical Earth is described and analytical expressions relating the source to the observable are introduced. Then, the gravity gradients responses at different spatial scales to flat, elementary mass sources located at the surface and at increasing depth are studied. Specifically, the paper investigates how a source width and orientation can be determined, for localized and oscillatory mass anomalies with different width‐to‐length aspect ratios. This theoretical case study aims at providing a basis for the analysis of more complex mass structures, when applying the presented method to static or time‐varying satellite gravity field models. It may help deciphering the nature of the gravity sources by the detection of meaningful geometries and orientations in the gravity field.

show abstract

Observing coseismic gravity change from the Japan Tohoku‐Oki 2011 earthquake with GOCE gravity gradiometry

Cited by 47 publications

References 35 publications

Antarctic outlet glacier mass change resolved at basin scale from satellite gravity gradiometry

Antarctic outlet glacier mass change resolved at basin scale from satellite gravity gradiometry

Transient gravity perturbations induced by earthquake rupture

An Analysis of Gravitational Gradients in Rotated Frames and Their Relation to Oriented Mass Sources

Contact Info

Product

Resources

About