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Weiyuan earthquake 2019

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Journal Article
Published: 07 October 2020
Seismological Research Letters (2020) 91 (6): 3182–3194.
... to HF triggered earthquakes, fluid injection for salt mining in the Changning area had been conducted for three decades, which possibly led to an M w  6.0 earthquake in June 2019 ( Lei et al. , 2019b ). In contrast, the Rongxian–Weiyuan region, located ∼ 150    km north...
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Journal Article
Published: 19 August 2020
Seismological Research Letters (2020) 91 (6): 3171–3181.
... the relationship between the seismotectonic model and seismic sequences from moderate M w 4.3 and M w 5.2 earthquakes that occurred in February and September 2019, respectively, in the Weiyuan anticline of Sichuan basin, China. We found that the M w 5.2 earthquake ruptured a back thrust of structural wedges...
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Interpreted seismic reflection profiles AA′, BB′, and CC′ images of the (a)...
Published: 19 August 2020
Figure 4. Interpreted seismic reflection profiles AA′, BB′, and CC′ images of the (a) representative section of structural wedges beneath the Weiyuan anticline, (b) geologic cross section across the location of the 2019 Weiyuan M w  5.2 earthquake, and (c) geologic cross section across
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(a) Topography map of the Longmen Shan and Sichuan basin. Instrumental seis...
Published: 19 August 2020
of the Sichuan basin. (b) Geologic map of the Weiyuan anticline in the Sichuan basin. Northeast‐trending fault traces parallel to the fold axis of the anticline are shown in red. The tear faults Ft1 and Ft2 are shown in magenta with the seismicity of the 2019 Weiyuan earthquakes. Seismic reflection profiles AA
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Surging <b>earthquakes</b> in the Sichuan basin. (a) Seismicity with local magnitu...
Published: 07 October 2020
( Lei et al. , 2017 , 2019a ). Red focal mechanism plot indicates the 25 February 2019 M w  4.3 ( M L  4.9) earthquake. WYSF, Weiyuan shale gas field. Inset shows the location of the study region. (b) Daily number of earthquakes ( M L > 1 ) in the Rongxian–Weiyuan region
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(a) Interpreted seismic reflection profile across the epicentral location o...
Published: 19 August 2020
and aftershocks of the 2019 M w  4.3 Weiyuan earthquake sequence.
Journal Article
Published: 03 April 2019
Seismological Research Letters (2019) 90 (3): 1099–1110.
..., six earthquakes of M L  4–4.9 were observed. The most recent one, an M L  4.9 event on 25 February 2019, killed two persons. Different responses in Weiyuan, Weixi, and Changning sites were interpreted by the differences in scale and density of pre‐existing faults. When compared...
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Journal Article
Published: 28 July 2021
Seismological Research Letters (2021)
... . Wang M. Yang H. Fang L. Han L. Jia D. Jiang D. , and Yan B. 2020 . Shallow faults reactivated by hydraulic fracturing: The 2019 Weiyuan earthquake sequences in Sichuan, China , Seismol. Res. Lett. 91 , 3171 – 3181 , doi: 10.1785/0220200174 . Wang S. Jiang...
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Journal Article
Published: 19 October 2021
Bulletin of the Seismological Society of America (2021)
... ). Moreover, Wang et al. (2015 , 2019) have shown that areas of enhanced susceptibility to triggering by oil and gas activities also show triggering of earthquakes by the minor stress perturbations induced by teleseisms. Stresses acting over larger distance scales (>1 km) may explain why some HF...
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Journal Article
Published: 01 April 2021
Seismological Research Letters (2021) 92 (2B): 1213–1479.
...- tified as one of the most active regions in the area, it was not until 28 December 2019 that the southwestern region of the island experienced a major significant event since 1918. The activity consisted of an ongoing seismic sequence with the larg- est earthquake, magnitude 6.4, occurring on 7 January...