| Institute of Geomechanics, Chinese Academy of Geological Sciences | Host |
| Citation: |
LIU Jie, ZHAO Gen-mo, WU Zhong-hai. THE EVOLUTION OF SEISMIC ACTIVITY IMAGE IN THE HIMALAYA BELT BEFORE AND AFTER 2015 NEPAL M 8.1 GREAT EARTHQUAKE[J]. Journal of Geomechanics, 2017, 23(1): 173-181.
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THE EVOLUTION OF SEISMIC ACTIVITY IMAGE IN THE HIMALAYA BELT BEFORE AND AFTER 2015 NEPAL M 8.1 GREAT EARTHQUAKE
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Abstract
Concerning on the future seismic risk brought by Himalaya orogenic belt after the April 25th, 2015 M8.1 Nepal earthquake, we analyze the strain energy release of Himalaya belt historical great earthquakes and study the regional seismicity images of both pre and post Nepal earthquake. The results show that Himalaya belt may has entered a new round of seismic active period. Crustal strain energy in the middle section of Himalaya belt didn't release completely in this earthquake, the earthquake activity is closely associated between the middle section of Himalaya belt and South Tibet Rift zone, there will be great earthquakes occurring in these two places. Assam gap zone and Bhutan gap zone exist on the east segment of Himalaya belt, meanwhile, Gar gap zone exists on the west, the border region of New Delhi and Tibet in western Himalaya belt and the Gar county area on the Karakorum fault have high seismic risk, Assam and Bhutan in southern Nyingchi, Shannan in eastern Himalaya belt also have high seismic risk, so these zones should be paid more attention to.
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Keywords:
- seismic strain energy release /
- seismic empty segment /
- seismic gap zone /
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References
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LIU Jie, ZHAO Gen-mo, WU Zhong-hai. THE EVOLUTION OF SEISMIC ACTIVITY IMAGE IN THE HIMALAYA BELT BEFORE AND AFTER 2015 NEPAL M 8.1 GREAT EARTHQUAKE[J]. Journal of Geomechanics, 2017, 23(1): 173-181.
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Figure 1.
Main active faults and historical earthquakes in Tibet Plateau and its adjacent areas
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Figure 2.
value curve of seismic data in the study area (USGS earthquake catalog)
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Figure 3.
The formation of seismic gap zone before the April 25th Nepal M8.1 earthquake
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Figure 4.
The formation of other seismic gap zones in Himalaya belt
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Figure 5.
Impact of the 2015 Nepal earthquake on Himalaya belt and its adjacent areas
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Figure 6.
Earthquake sequence with M≥7.0 (above)and seismic strain release curve (below) of Himalaya arc