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2018-2021 earthquake sequences in northern Longitudinal Valley, Taiwan
2018-2021 earthquake sequences in northern Longitudinal Valley, Taiwan
After destructive 2018 ML6.4 Hualien earthquake, a series of M5.5+ earthquakes occurred in the northern Longitudinal Valley. In particular, the two 2021 Hualien earthquakes that occurred subsequently in half a year and rattled the area with prolonged aftershock activity (or called swarm) have revoked people’s attention and urged an investigation into local seismogenic structures. For that, we relocate the 2018–2021 earthquake sequences and determine their focal mechanisms to re-assess the seismogenic structures of the northern Longitudinal Valley
Figure: Distribution of earthquake clusters before and after relocation and redetermined first-motion focal mechanisms. (a) The epicenter of the seismic cluster from the original earthquake catalog. (b) The epicenter of the seismic cluster after 3D-DD relocation. The black dashed circles indicate the fault segments remaining locked. (c) The first-motion focal mechanism from this study. The color represents the focal depth (km) of these events.
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Citation
Huang, H.-H.* and Y. Wang* (2022), Seismogenic structure beneath the northern Longitudinal Valley revealed by the 2018-2021 Hualien earthquake sequences, Terre. Atmos. Oceanic Sci., 33:17, https://doi.org/10.1007/s44195-022-00017-z.
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