Near-source released energy in relation to fracture energy on earthquake faults

• Mikumo, Takeshi

• Fukuyama, Eiichi

抄録

The near-source energy released on a fault is estimated through the strain energy change and the fracture energy from the results of kinematic waveform inversion and dynamic modeling for two different types of earthquakes: a shallow crustal earthquake, the 2000 Tottori, Japan (Mw 6.6) earthquake, and an in-slab event, the 1999 Oaxaca, Mexico (Mw 7.5) earthquake. The procedure incorporates the spatial distribution of slip, critical slip-weakening distance, stress drop, and strength excess. The results show that the near-source energy density estimated over major asperities on the fault is nearly the same for the two earthquakes, while the fracture energy on the in-slab fault is appreciably larger than that for the crustal fault, suggesting higher strength in the in-slab fault zone. The near-source released energy on major asperities is significantly larger than the fracture energy in the two earthquakes.

収録刊行物

• Bulletin of the Seismological Society of America

  Bulletin of the Seismological Society of America 96 (3), 1177-1181, 2006-06

  Seismological Society of America

詳細情報

• CRID: 1050845760732625920
• NII論文ID: 120005537639
• NII書誌ID: AA00589385
• ISSN: 00371106
• HANDLE: 2433/193416
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles