Global co-seismic displacements caused by the 2004 Sumatra-Andaman earthquake (Mw 9.1)

Fu, G.; Sun, Wenke

doi:10.1186/bf03353371

Cited by 28 publications

(23 citation statements)

References 10 publications

(35 reference statements)

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“…Several aspects of the 2004 tsunami around the Indian Ocean have been addressed: seismogenic fault rupture (Lay et al, 2005;Stein and Okal, 2005;Fu and Sun, 2006;Sibuet et al, 2007), numerical modelling (Hébert et al, 2007), morphological impacts Wassmer et al, 2007;Paris et al 2009), boulder transport and deposition (Paris et al, 2010), sediment transfers ) and sedimentary signature Paris et al, 2007).…”

Section: The Eventmentioning

confidence: 98%

Use of anisotropy of magnetic susceptibility (AMS) in the study of tsunami deposits: Application to the 2004 deposits on the eastern coast of Banda Aceh, North Sumatra, Indonesia

et al. 2010

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Section: The Eventmentioning

confidence: 98%

Use of anisotropy of magnetic susceptibility (AMS) in the study of tsunami deposits: Application to the 2004 deposits on the eastern coast of Banda Aceh, North Sumatra, Indonesia

et al. 2010

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“…We calculate coseismic horizontal displacements as far afield as Flin Flon in central Canada (0.7 mm), 1.5 mm at Capetown, South Africa and 0.5 mm in Santiago, Chile. This is in general agreement with the computations of, for example, Fu and Sun [], but is notably smaller in magnitude across Africa and South America than the results of Kreemer et al [] (the spherical layer model code of Pollitz [] used in their study did not accurately calculate deformation over the longest spatial scales. The version of the code used in this study is appropriate for full global calculations (F. Pollitz, personal communication, July 2011)).…”

Section: Earthquake Modelingmentioning

confidence: 99%

“…Detection of far‐field coseismic displacements greater than a few millimeters caused by the Sumatra‐Andaman earthquake [e.g., Vigny et al , ; Fu and Sun , ; Kreemer et al , ] show the power of using Global Positioning System (GPS) estimates to quantify global deformation, although very distant (i.e., > 1000 km) displacements caused by the smaller of the great earthquakes have not previously been identified. Recent improvements in the analysis of GPS observations [e.g., Boehm et al , ] have provided the ability to detect temporal variations in site movements at the submillimeter level [e.g., Steigenberger et al , ; Tregoning and Watson , , ], and to make velocity estimates with a precision of 0.3 mm/yr [ Altamimi et al , ].…”

Section: Introductionmentioning

confidence: 99%

A decade of horizontal deformation from great earthquakes

et al. 2013

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The 21st Century has seen the occurrence of 17 great earthquakes (Mw >8), including some of the largest earthquakes ever recorded. Numerical modeling of the earthquakes shows that nearly half of the Earth's surface has undergone horizontal coseismic deformation >1 mm, with the 2004 Sumatra‐Andaman earthquake dominating the global deformation field. This has important implications for both the realization of a terrestrial reference frame and in the interpretation of regional tectonic studies based on GPS velocities. We show that far‐field coseismic deformations from great earthquakes will, if unaccounted for, introduce errors in estimates of linear site velocities of at least 0.1‐0.3 mm/yr across most of the surface of the Earth. The accumulated global deformation field shows that two regions, Australia and the north Atlantic/Arctic Ocean, have been largely undeformed by these great earthquakes, with accumulated deformations generally <0.5 mm. Using GPS estimates of surface deformation, we show that the majority of the Australian continent is deforming at <0.2 mm/yr, the northern part of New Zealand is rotating clockwise relative to the Australian Plate with relative horizontal velocities of ∼2 mm/yr, while the southeastern coast of Australia is undergoing post‐seismic relaxation caused by the 2004 Mw = 8.1 Macquarie Ridge earthquake. The presence of ongoing post‐seismic relaxation thousands of kilometers from plate margins violates the secular/linear assumption made in current terrestrial reference frame definitions. These effects have significant ramifications for regional tectonic interpretations and global studies such as sea level rise that require reference frame accuracy greater than this level.

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“…southwest China (Fu and Sun 2006;Qiao et al 2007). Few cGPS stations were in operation at that time in broad areas affected by these events.…”

Section: Discussionmentioning

confidence: 99%

Co-Seismic Effect of the 2011 Japan Earthquake on the Crustal Movement Observation Network of China

Yang¹,

Tan²,

Wang³

2013

Terr. Atmos. Ocean. Sci.

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Great earthquakes introduce measurable co-seismic displacements over regions of hundreds and thousands of kilometers in width, which, if not accounted for, may significantly bias the long-term surface velocity field constrained by GPS observations performed during a period encompassing that event. Here, we first present an estimation of the far-field co-seismic off-sets associated with the 2011 Japan M w 9.0 earthquake using GPS measurements from the Crustal Movement Observation Network of China (CMONOC) in North China. The uncertainties of co-seismic off-set, either at cGPS stations or at campaign sites, are better than 5 -6 mm on average. We compare three methods to constrain the co-seismic off-sets at the campaign sites in northeastern China 1) interpolating cGPS coseismic offsets, 2) estimating in terms of sparsely sampled time-series, and 3) predicting by using a well-constrained slip model. We show that the interpolation of cGPS co-seismic off-sets onto the campaign sites yield the best co-seismic off-set solution for these sites. The source model gives a consistent prediction based on finite dislocation in a layered spherical Earth, which agrees with the best prediction with discrepancies of 2 -10 mm for 32 campaign sites. Thus, the co-seismic off-set model prediction is still a reasonable choice if a good coverage cGPS network is not available for a very active region like the Tibetan Plateau in which numerous campaign GPS sites were displaced by the recent large earthquakes.

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Global co-seismic displacements caused by the 2004 Sumatra-Andaman earthquake (Mw 9.1)

Cited by 28 publications

References 10 publications

Use of anisotropy of magnetic susceptibility (AMS) in the study of tsunami deposits: Application to the 2004 deposits on the eastern coast of Banda Aceh, North Sumatra, Indonesia

Use of anisotropy of magnetic susceptibility (AMS) in the study of tsunami deposits: Application to the 2004 deposits on the eastern coast of Banda Aceh, North Sumatra, Indonesia

A decade of horizontal deformation from great earthquakes

Co-Seismic Effect of the 2011 Japan Earthquake on the Crustal Movement Observation Network of China

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