JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Gravity Variation Estimation of the 2011 Tohoku Earthquake
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Gravity Variation Estimation of the 2011 Tohoku Earthquake
Kim, Kwang Bae; Lee, Chang Kyung;
  PDF(new window)
 Abstract
Gravity variations due to the 2011 Tohoku (M9.0) earthquake, which occurred at the plate boundaries near the northeastern coast of Japan, were estimated through the GRACE spherical harmonic (Stokes) coefficients derived from the CSR. About -5 μGal gravity variation by the GRACE data was found in the back-arc basin area with respect to a reference gravity model. The mean gravity variations in the back-arc basin area and the Japan Trench area were -4.4 and -3.2 μGal in order. The small negative gravity variations around the Japan Trench area can be interpreted by both crustal dilatation and the seafloor topography change in comparison with the large negative gravity variations in the back-arc basin area by co-seismic crustal dilatation of the landward plate. From the results of the gravity variations, vertical displacements generated from relatively short wavelength caused by the earthquake were estimated by use of multi-beam bathymetric measurements obtained from JAMSTEC. The maximum seafloor topography changes of about ±50 m were found at west side of the Japan Trench axis by the earthquake. The seafloor topography change by the megathrust earthquake can be considered as the results of the landslide of the seafloor throughout the landward side.
 Keywords
Gravity Variation, 2011 Tohoku Earthquake;GRACE;Japan Trench;Seafloor Topography Change;
 Language
English
 Cited by
 References
1.
Ammon, C.J., Lay, T., Kanamori, H., and Cleveland, M. (2011), A rupture model of the 2011 off the Pacific coast of Tohoku earthquake, Earth Planets Space, Vol. 63, pp. 693-696, doi:10.5047/eps.2011.05.015. crossref(new window)

2.
Bettadpur, S. (2007), Level-2 Gravity Field Product User Handbook. GRACE 327-734, Center for Space Research, The University of Texas at Austin.

3.
Bettadpur, S. (2008), GRACE: Progress towards product improvement, and prospects for synergy with GOCE, 2008, Oral presentation, GGEO 2008 Symposium, June 23-27, 2008, Chania, Crete, Greece.

4.
Cambiotti, G. and Sabadini, R. (2013), Gravitational seismology retrieving Centroid-Moment-Tensor solution of the 2011 Tohoku earthquake, J. Geophys. Res., 118, pp. 183–194, doi:10.1029/2012JB009555. crossref(new window)

5.
Cheng, M. and Tapley, B.D. (2004), Variations in the Earth's oblateness during the past 28 years, Journal of Geophysical Research, Vol. 109, B09402, doi:10.1029/2004JB003028. crossref(new window)

6.
Han, S.-C., Shum, C.K., Bevis, M., Ji, C., and Kuo, C.-Y. (2006), Crustal dilatation observed by GRACE after the 2004 Sumatra-Andaman earthquake, Science, Vol. 313, pp. 658-662. crossref(new window)

7.
Han, S.-C., Sauber, J., and Luthcke, S. (2010), Regional gravity decrease after the 2010 Maule (Chile) earthquake indicates large-scale mass redistribution, Geophysical Research Letters, Vol. 37, L23307, doi:10.1029/2010GL045449. crossref(new window)

8.
Han, S.-C., Sauber, J., and Riva, R. (2011), Contribution of satellite gravimetry to understanding seismic source processes of the 2011 Tohoku-Oki earthquake, Geophysical Research Letters, Vol. 38, L24312, doi:10.1029/2011GL049975. crossref(new window)

9.
Han, S.-C., Riva, R., Sauber, J., and Okal, E. (2013), Source parameter inversion for recent great earthquakes from a decade-long observation of global gravity fields, Journal of Geophysical Research, Vol. 118, pp. 1240–1267, doi:10.1002/jgrb.50116. crossref(new window)

10.
Han, S.-C., Sauber, J., and Pollitz, F. (2014), Broadscale postseismic gravity change following the 2011 Tohoku-Oki earthquake and implication for deformation by viscoelastic relaxation and afterslip, Geophysical Research Letters, Vol. 41, pp. 5797–5805, doi:10.1002/2014GL060905. crossref(new window)

11.
Heki, K. and Matsuo, K. (2010), Coseismic gravity changes of the 2010 earthquake in central Chile from satellite gravimetry, Geophysical Research Letters, Vol. 37, L24306, doi:10.1029/2010GL045335. crossref(new window)

12.
Jekeli, C. (1981), Alternative Methods to Smooth the Earth's Gravity Field, Rep. 327, Dept. of Geodetic Science and Surveying, Ohio State University, Columbus.

13.
Kim, K.B. and Lee, C.K. (2015), Bathymetry change investigation of the 2011 Tohoku earthquake, Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, Vol. 33, No. 3, pp. 181-192. crossref(new window)

14.
Lee, S.-J. (2012), Rupture process of the 2011 Tohoku-Oki earthquakes based upon joint sources inversion of teleseismic and GPS data, Terrestrial, Atmosphere and Oceanic Sciences, Vol. 23, No. 1, pp. 1-7, doi:10.3319/TAO.2011.07.11.01(T). crossref(new window)

15.
Matsuo, K. and Heki, K. (2011), Coseismic gravity changes of the 2011 Tohoku-Oki earthquake from satellite gravimetry, Geophysical Research Letters, Vol. 38, L00G12, doi:10.1029/2011GL049018. crossref(new window)

16.
Ozawa, S., Nishimura, T., Suito, H., Kobayashi, T., Tobita, M., and Imakiire, T. (2011), Coseismic and postseismic slip of the 2011 magnitude-9 Tohoku-Oki earthquake, Nature, Vol. 475, pp. 373-377, doi:10.1038/nature10227. crossref(new window)

17.
Pollitz, F.F. (2006), A new class of earthquake observations, science, Vol. 313, pp. 619-620, doi:10.1126/science.1131208. crossref(new window)

18.
Rangelova, E.V. (2007), A Dynamic Geoid Model for Canada, Ph.D. dissertation, Department of Geomatics Engineering, University of Calgary, Calgary, Canada, 242p.

19.
Schmidt, R., Flechtner, F., Meyer, U., Neumayer, K.-H., Dahle, Ch., König, R., and Kusche, J. (2008), Hydrological signals observed by the GRACE satellites, Surveys in Geophysics, Vol. 29, No. 4, pp. 319-334, doi:10.1007/s10712-008-9033-3. crossref(new window)

20.
Seeber, G. (2003), Satellite Geodesy, Walter de Gruyter, Berlin, New York.

21.
Swenson, S. and Wahr, J. (2006), Post-processing removal of correlated errors in GRACE data, Geophysical Research Letters, Vol. 33, L08402, doi:10.1029/2005GL025285. crossref(new window)

22.
Tapley, B.D., Bettadpur, S., Watkins, M., and Reigber, C. (2004a), The gravity recovery and climate experiment: mission overview and early results, Geophysical Research Letters, Vol. 31, L09607, doi:10.1029/2004GL019920. crossref(new window)

23.
Tapley, B.D., Bettadpur, S., Watkins, M., and Reigber, C. (2004b), GRACE measurements of mass variability in the Earth system, Science, Vol. 305, pp. 503-505. crossref(new window)

24.
Tapley, B.D., Ries, J., Bettadpur, S., Chambers, D., Cheng, M., Condi, F., and Poole, S. (2007), The GGM03 mean earth gravity model from GRACE, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract G42A-03.

25.
Wahr, J., Molenaar, M., and Bryan, F. (1998), Time-variability of the Earth’s gravity field: hydrological and oceanic effects and their possible detection using GRACE, Journal of Geophysical Research, Vol. 103(B12), pp. 30205-30230. crossref(new window)

26.
Wang, L., Shum, C.K., Simons, F.J., Tapley, B., and Dai, C. (2012), Coseismic and postseismic deformation of the 2011 Tohoku-Oki earthquake constrained by GRACE gravimetry, Geophysical Research Letters, Vol. 39, L07301, doi:10.1029/2012GL051104. crossref(new window)

27.
Wessel, P. and Smith, W.H.F. (1998), New improved version of the generic mapping tools released, EOS Transaction, American Geophysical Union, Vol. 79, No. 47, p. 579, doi:10.1029/98EO00426. crossref(new window)