globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2734
论文题名:
Himalayan strain reservoir inferred from limited afterslip following the Gorkha earthquake
作者: Mencin D.; Bendick R.; Upreti B.N.; Adhikari D.P.; Gajurel A.P.; Bhattarai R.R.; Shrestha H.R.; Bhattarai T.N.; Manandhar N.; Galetzka J.; Knappe E.; Pratt-Sitaula B.; Aoudia A.; Bilham R.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:7
起始页码: 533
结束页码: 537
语种: 英语
Scopus关键词: aftershock ; decollement ; earthquake event ; earthquake magnitude ; earthquake rupture ; fault plane ; GPS ; ground motion ; seismic moment ; slip ; strain measurement ; thrust ; Bagmati ; Gandaki ; Gorkha ; Himalayas ; Kathmandu ; Nepal
英文摘要: The magnitude 7.8 Gorkha earthquake in April 2015 ruptured a 150-km-long section of the Himalayan décollement terminating close to Kathmandu. The earthquake failed to rupture the surface Himalayan frontal thrusts and raised concern that a future Mw ≤ 7.3 earthquake could break the unruptured region to the south and west of Kathmandu. Here we use GPS records of surface motions to show that no aseismic slip occurred on the ruptured fault plane in the six months immediately following the earthquake. We find that although 70 mm of afterslip occurred locally north of the rupture, fewer than 25 mm of afterslip occurred in a narrow zone to the south. Rapid initial afterslip north of the rupture was largely complete in six months, releasing aseismic-moment equivalent to a Mw 7.1 earthquake. Historical earthquakes in 1803, 1833, 1905 and 1947 also failed to rupture the Himalayan frontal faults, and were not followed by large earthquakes to their south. This implies that significant relict heterogeneous strain prevails throughout the Main Himalayan Thrust. The considerable slip during great Himalayan earthquakes may be due in part to great earthquakes tapping reservoirs of residual strain inherited from former partial ruptures of the Main Himalayan Thrust. © 2016 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105970
Appears in Collections:气候减缓与适应
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作者单位: CIRES, Department of Geological Sciences, University of Colorado, Boulder, CO, United States; Department of Geosciences, University of Montana, Missoula, MT, United States; Nepal Academy of Science and Technology, Khumaltar, Lalitpur, Nepal; Department of Geology, Tri-Chandra Campus, Tribhuvan University, Ghantaghar, Kathmandu, Nepal; Nepal Survey Department, PO Box 9435, Min Bhawan, Kathmandu, Nepal; UNAVCO, 6350 Nautilus Drive, Boulder, CO, United States; CentralWashington University, Geological Sciences Department, 400 E UniversityWay, Ellensburg, WA, United States; Abdus Salam International Centre for Theoretical Physics, Strada Costiera, 11, Trieste, Italy

Recommended Citation:
Mencin D.,Bendick R.,Upreti B.N.,et al. Himalayan strain reservoir inferred from limited afterslip following the Gorkha earthquake[J]. Nature Geoscience,2016-01-01,9(7)
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