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Crustal deformations associated with the great Sumatra-Andaman earthquake deduced from continuous GPS observation
Earth, Planets and Space volume 58, pages127–139(2006)
We analyzed continuous GPS data from more than 20 sites in Asia, Australia and islands in Indian Ocean in order to detect crustal deformations associated with the Sumatra-Andaman earthquake of December 26, 2004. Coseismic steps can be recognized at sites about 3,000 km away from the epicenter such as Kunming in south China, Quezon in Philippines, and Diego Garcia Island in central Indian Ocean. The largest displacement of about 26 cm is found at Phuket in Thailand about 600 km away from the epicenter, about twice as large as that at Sampari, the nearest site in northern Sumatra. These observations suggest that as large slip as 14 m occurred beneath the Nicobar Islands. Large postseismic displacements are observed at Phuket and Sampari after the mainshock, but the former is three times larger than the latter. This suggests that the spatial distribution of afterslip is different from the coseismic slip distribution. The temporal variation of postseismic displacements can be explained by a logarithmic function derived from rate-state dependent friction law with short characteristic time. The area where coseismic displacements from the Nias earthquake of March 28, 2005 are detected is much smaller than that from the December mainshock, but displacement at Sampari is larger than that during the mainshock. These displacements suggest less than 4 m slip on a shallow dipping thrust fault and resultant moment release is smaller than that estimated from seismological data. Finally, total moment released by afterslip amounts to 3.83 × 1022 Nm which is equivalent to Mw 8.99 for about five months, including the afterslip for the Nias earthquake.
Ammon, C. J., C. Ji, H.-K. Thio, D. Robinson, S. Ni, V. Hjorleifsdottir, H. Kanamori, T. Lay, S. Das, D. Helmberger, G. Ichinose, J. Polet, and D. Wald, Rupture process of the 2004 Sumatra-Andaman earthquake, Science, 308, 1133–1139, 2005.
Banerjee, P. F. F. Pollitz, and R. Bürgmann, The size and duration of the Sumatra-Andaman earthquake from far-field static offsets, Sciencexpress, /www.sciencexpress.org/19 May 2005/Page1/10.1126/science.1113746, 2005.
Bilham, R., A flying start, then a slow slip, Science, 308, 1126–1127, 2005.
Bock, Y., L. Prawirodirdjo, J. F Genrich, C. W. Stevens, R. McCaffrey, C. Subarya, S. S. O. Puntodewo, and E. Calias, Crustal motion in Indonesia from global positioning system measurements, J. Geophys. Res., 108(B8), 2367, doi:10.1029/2001JB000324, 2003.
Earnest, A. and C. P. Rajendran, The deformation characteristics along the Andaman-Nicobar arc associated with the Dec. 26, 2004 megathrust earthquake: insights from GPS data, AOGS2005, 58-SE-A0286, 2005.
Heki, K., H. Tsuji, and S. Miyazaki, Silent fault slip following an interplate thrust earthquake at the Japan trench, Nature, 386, 595–598, 1997.
Hugentobler, U., R. Dach, and P. Fridez, Bernese GPS Software Version 5.0, AIUB, University of Bern, 388 pp., 2005.
Ikeda, Y., S. Kayane, T. Echigo, M. Shishikura, and M. Kamataki, Crustal deformations in Andaman Islands associated with the Sumatra-Andaman earthquake and paleoseismological evidence, Presented at the 164th Meeting of the Coordinating Committee for Earthquake Prediction, http://cais.gsi.go.jp/YOCHIREN/JIS/164/image164/013.pdf, 2005 (in Japanese).
Ishihara, Y and N. Suda, Source image of 2004 Sumatra mega quake by earth’s free oscillation analysis, Program and Abstracts of the 2005 Joint Meeting of the Earth and Planetary Sciences of Japan, J113-06, 2005.
Larsen, C.,F., K. A. Echelmeyer, J. T. Freymueller, and R. J. Motyka, Tide gauge records of uplift along the northern Pacific-North American plate boundary, 1937 to 2001, J. Geophys. Res., 108(B4), 2216, doi:10.1029/2001JB001685, 2003.
Lay, T., H. Kanamori, C. J. Ammon, M. Nettles, S. N. Ward, R. C. Aster, S. L. Beck, S. L. Bilek, M. R. Brudzinski, R. Butler, H. R. DeShon, G. Ekstrom, K. Satake, and S. Sipkin, The great Sumatra-Andaman earthquake of 26 December 2004, Science, 308, 1127–1133, 2005.
Marone, C, C. H. Scholz, and R. Bilham, On the mechanics of earthquake afterslip, J. Geophys. Res., 96, 8441–8452, 1991.
Miura, S., S. Yui, N. Uchida, A. Hasegawa, and Y Yagi, Spatiotemporal Evolution of Postseimic Slip Following the 2003 Tokachi-oki Earthquake (M8.0) Estimated by GPS and Repeating Earthquakes, AOGS2005, 58-SE-A1378, 2005.
Miyazaki, S., P. Segall, J. Fukuda, and T. Kato, Space-time distribution of afterslip following the 2003 Tokachi-oki earthquake: implications for variations in fault zone frictional properties, Geophys. Res. Lett., 31, L06623, doi:10.1029/2003GL019140, 2004.
Murakami, M., Slow slip preceding M7 earthquake doublet in 2004 offshore eastern Hokkaido Japan along the Kuril trench, Program and Abstracts of the 2005 Joint Meeting of the Earth and Planetary Sciences of Japan, S088-004, 2005.
NEIC/USGS, http://neic.usgs.gov/neis/epic/epic.html, 2005.
Okada, Y., Surface deformation due to shear and tensile faults in a half-space, Bull. Seismol. Soc. Amer., 75, 1135–1154, 1985.
Park, J., T-R. A. Song, J. Tromp, E. Okal, S. Stein, G. Roult, E. Clevede, G. Laske, H. Kanamori, P. Davis, J. Berger, C. Braitenberg, M. Van Camp, Lei, H. Sun, H. Xu, and S. Rosat, Earth’s free oscillations excited by the 26 Decmenber 2004 Sumatra-Andaman earthquake, Science, 308, 1139–1144, 2005.
Rajendran, C. P., A. Earnest, K. Rajendran, R. Bilham, and J. T. Freymueller, A slow Mw≥8.7 earthquake embedded in the Andaman segment of the great 2004 Sumatra rupture, Nature, 2005 (submitted).
Shishikura, M. and S. Tsuchida, Crustal movement of the Andaman Islands during the 2004 Sumatra earthquake, analyzed from ASTER data, Program and Abstracts of the 2005 Joint Meeting of the Earth and Planetary Sciences of Japan, J113p-011, 2005.
Stein, S. and E. Okal, Speed and size of the Sumatra earthquake, Nature, 434, 581–582, 2005.
Suito, H., M. Tobita, T. Imakiire, and M. Kaidzu, Fault model of 2004 Off Sumatra earthquake, Indonesia based on satellite images, Program and Abstracts of the 2005 Joint Meeting of the Earth and Planetary Sciences of Japan, J113-010, 2005.
Tabei, T. and W. L. Amin, Common-mode errors in the GPS coordinates time series—application of spatial filtering technique, J. Geod. Soc. Jpn., 48, 229–241, 2002.
Tobita, M., M. Kaidzu, M. Murakami, M. Tsuzawa, T. Imakiire, H. Yarai, H. Suito, Y. Fukuzaki, M. Kato, S. Fujiwara, A. Itabashi, and H. Nakai, Coastline change and tsunami inundation area of northern Sumatra Island inferred from satellite synthetic aperture radar images, Program and Abstracts of the 2005 Joint Meeting of the Earth and Planetary Sciences of Japan, J113-09, 2005.
Vigny, C., W. J. F. Simons, S. Abu, R. Bamphenyu, C. Satirpod, M. Chhosakul, C. Subarya, K. Omar, H. Z. Abindin, A. Socquet, and B. A. C. Ambrosius, Insight into the 2004 Sumatra-Andaman earthquake from GPS measurements in southeast Asia, Nature, 436, 201–206, doi:10.1038/nature03937, 2005.
Wang, K., J. He, and H. Dragert Postseismic deformation of long-rupture (~900 km) great subduction earthquakes and mantle viscosity, Seismol. Res. Lett., 73, 235, 2002.
Wdowinski, S., Y. Bock, J. Zhang, P. J. Genrich, Southern California permanent GPS geodetic array: spatial filtering of daily positions for estimating coseismic and postseismic displacements induced by the 1992 Landers earthquake, J. Geophys. Res., 102, 18057–18070, 1997.
Wessel, P. and W. H. F. Smith, New, improved version of Generic Mapping Tools released, EOS Trans. Amre. Geophys. U., 79(47), 579, 1998.
Wu, C. and K. Koketsu, Rupture process of the 2004 Mw 9.0 off the west coast of northern Sumatra earthquake, Program and Abstracts of the 2005 Joint Meeting of the Earth and Planetary Sciences of Japan, J113-04, 2005.
Yagi, Y., Preliminary results of rupture process for 2004 off coast of northern Sumatra giant earthqauke (ver. 1), http://iisee.kenken.go.jp/staff/yagi/eq/Sumatra2004/Sumatra2004.html, 2005.
Yagi, Y., M. Kikuchi, and T. Sagiya, Co-seismic slip, post-seismic slip, and aftershocks associated with two large earthquakes in 1996 Hyuga-nada, Japan, Earth Planets Space, 53, 793–803, 2001.
Yamanaka, Y., Source process of 2004 Sumatra earthquake, Program and Abstracts of the 2005 Joint Meeting of the Earth and Planetary Sciences of Japan, J113-02, 2005.
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Hashimoto, M., Choosakul, N., Hashizume, M. et al. Crustal deformations associated with the great Sumatra-Andaman earthquake deduced from continuous GPS observation. Earth Planet Sp 58, 127–139 (2006). https://doi.org/10.1186/BF03353369
- Sumatra-Andaman earthquake
- Nias earthquake
- coseismic deformation
- postseismic deformation
- fault model