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日本东部内陆地区2011年大地震前后的应力状态与诱发地震 被引量:3

Stress before and after the 2011 great Tohoku-oki earthquake and induced earthquakes in inland areas of eastern Japan
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摘要 通过反演震源机制数据,得到了东日本大地震前后日本东部内陆地区的应力场。地震前,在东北部(Tohoku),σ1轴呈EW方向,但在关东-东部(Kanto-Chubu)地区则呈NW-SE方向。地震后,在Tohoku北部和靠近磐城市(Iwaki City)的Tohoku东南部,应力场发生了变化,主应力取向大致等同于与地震相关的静应力变化取向。这说明地震前这些地区的差应力值小于1MPa。在Tohoku中部,虽然地震后加载的应力取向几乎逆转,但其应力场没有发生变化,说明那里的差应力值大大超过1MPa。在Kanto-Chubu,地震后加载了与背景应力方向近乎相同的应力,且应力场没有发生预期的变化。这可能就是Kanto-Chubu地区高地震活动水平的诱因。
出处 《国际地震动态》 2012年第4期7-12,共6页 Recent Developments in World Seismology
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  • 1Hirose F, Miyaoka K, Hashimoto N, et al. Outline of the 2011 off the Pacific coast of Tohoku earth- quake (Mw9.0) seismicity.. Foreshocks, mainshock, aftershocks, and induced activity. Earth Planets Space, 2011, 63.. 513-518.
  • 2Hasegawa A, Horiuchi S, Umino N. Seismic structure of the northeastern Japan convergent margin: A synthesis. J. Geophys. Res., 1994, 99:22295-22311.
  • 3Asano Y, Saito T, Ito Y, et al. Spatial distribution and focal mechanisms of aftershocks of the 2011 off the Pacific coast of Tohoku earthquake. Earth Planets Space, 2011, 63:669-673.
  • 4Iinuma T, Ohzono M, Ohta Y, et al. Coseismic slip distribution of the 2011 off the Pacific coast of Tohoku earthquake (M9.0) estimated based on GPS data Was the asperity in Miyagi-oki ruptured? Earth Planets Space, 2011, 63:643-648.
  • 5Hardebeck J L, Shearer P M. A new method for determining first-motion focal mechanisms. Bull. Seism. Soc. Am., 2~02, 92.. 2 264-2 276.
  • 6Frohlich C. Triangle diagrams: Ternary graphs to display similarity and diversity of 3 earthquake focal mechanisms. Phys. Earth Planet. Inter., 1992, 75:193-198.
  • 7Hardebeck J L, Michael A J. Damped regional-scale stress inversions: Methodology and examples for Southern California and the Coalinga aftershock sequence. J. Geophys. Res., 2006, 111, Bl1310, doi.. 10. 1029/2005JB004144.
  • 8Townend J, Zoback M D. Stress, strain, and mountain building in central Japan. J. Geophys. Res., 2006, 111, B03411, doi:10. 1029/2005JB003759.
  • 9Okada Y. Internal deformation due to shear and tensile faults in a half-space. Bull. Seism. Soc. Am., 1992, 82:1018-1040.
  • 10Lay T, Ammon C J, Kanamori H, et al. Possible large near-trench slip during the great 2011 Tohoku (Mw9.0) earthquake. Earth Planets Space, 2011, 63.. 687-692.

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