2020 Qiaojia earthquake

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Coordinates: 27°15′58″N 103°17′17″E / 27.266°N 103.288°E / 27.266; 103.288
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27°15′58″N 103°17′17″E / 27.266°N 103.288°E / 27.266; 103.288

2020 Qiaojia earthquake
CST
MagnitudeMw5.1
Depth10.0 km (6.2 mi)
Epicenter27°15′58″N 103°17′17″W / 27.266°N 103.288°W / 27.266; -103.288
Areas affectedYunnan
Total damageSeveral buildings damaged, 1 collapsed house
Max. intensityMMI VI (Strong)[1]
Landslides167[2]
Aftershocks1 (as of 5/19/20)[3]
Casualties4 dead, 24 injured[4]

The 2020 Qiaojia earthquake (

Zhaoyang District. Four people were killed while 24 people were injured.[4]

Tectonic setting

The lateral spreading of the thickened crust of the

strike-slip structure. This fault system divides into two main strands, the Anninghe-Zemuhe and Daliangshan faults. Near where these two strands rejoin to the south, a SW–NE trending right lateral fault zone is developed on the eastern side of the XFS, the Zhaotong–Ludian fault. The XFS has been the location of many large and damaging earthquakes, such as the 1981 Dawu and 2010 Yushu earthquakes. In 2014 a major earthquake occurred close to the trace of the Zhaotong-Ludian Fault.[2][5]

Earthquake

The measured magnitude was 5.1 Mw  with a

strike-slip on one of two nodal planes orientated 170° and 263°. The NNW-SSE trending solution matches best with the elongation of isoseismal lines in a 160° direction and the trend of aftershocks within the first 24 hours after the event in a 175° direction. The causative fault has been identified as the Xiaohe-Baogunao Fault based on its orientation and proximity to the epicentre and the area affected by co-seismic landslides. Based on the distribution of aftershocks, the 2014 Ludian earthquake has also been explained by movement along another part of this fault zone.[2]

Damage

There was significant damage to parts of Xiaohe Township in

Zhaotong City to the affected area, with 16 townships being visited by rescuers.[4][6]

The earthquake shaking triggered a large number of landslides on the slopes of the surrounding hills. 167 separate landslides were mapped, with the largest having an area of 8,345 m2. The total estimated volume of all the landslides was 2.97x106 m3.[2]

See also

References

  1. ^ a b c "M 5.1 - 42 km W of Zhaotong, China". earthquake.usgs.gov. Archived from the original on 2020-05-26. Retrieved 2021-06-25.
  2. ^
    S2CID 238255107
    .
  3. ^ "Latest Earthquakes".
  4. ^ a b c "4 killed, 24 injured as earthquake hits China's southwestern Yunnan province". Hindustan Times. 2020-05-19. Retrieved 2020-05-19.
  5. doi:10.1093/gji/ggab420
    .
  6. ^ Huaxia (2020-05-19). "Death toll in SW China quake rises to four". Xinhuanet. Archived from the original on May 21, 2020. Retrieved 2022-02-24.
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