Deep learning-based earthquake catalog of the 2022 MW 6.9 Chihshang, Taiwan, earthquake sequence

On 18 September 2022, the MW 6.9 Chihshang earthquake struck the southern Longitudinal Valley, Taiwan. We use SeisBlue, a deep-learning platform/package, to extract the two-month earthquake sequence from September to October 2022, including the MW 6.5 Guanshan foreshock, the MW 6.9 mainshock, over 14,000 aftershocks, and 866 focal mechanisms from two sets of broadband networks. For more details, please refer to our research article published at TAO (Sun et al., 2024; https://doi.org/10.1007/s44195-024-00063-9). The refined SeisBlue earthquake, FMS, and 20-year M3+ relocated CWA earthquake catalogs obtained in this study are listed here. The refined, deep-learning-based earthquake catalog of the 2022 Mw 6.9 Chihshang, Taiwan, earthquake sequence contains 5,151 seismic events with event time, location and error information, local and moment magnitudes, and hypoDD location. The FMS (focal mechanism solution) catalog is obtained by the P-wave polarities of 14 broadband stations and the FPFIT program (Reasenberg & Oppenheimer, 1985). 865 out of 1629 FMSs with at least six readings of P-wave polarity, F-fator ≤ 0.1 (F < 0.5 for a good fit), and errors of strike, dip, and rake are all < 20°, respectively, are listed in the attached FMS catalog. The 2001-2020 3D-hypoDD-relocated M3+ CWA earthquake catalog: We applied the HypoDD program (Waldhauser & Ellsworth, 2000) to the CWA (Central Weather Administration (CWA, Taiwan), 2012) catalog with P- and S-wave arrivals and obtained 5862 M3+ events between 2001 and 2020 for eastern Taiwan. The 3D velocity models used for this catalog are the local models from Kuo-Chen et al. (2012).2022年9月18日，矩震级（Moment Magnitude, MW）6.9级的池上地震（Chihshang earthquake）袭击了中国台湾地区南部纵谷。我们采用深度学习平台/工具包SeisBlue（SeisBlue），提取了2022年9月至10月为期两个月的地震序列，其中包含矩震级6.5级的关山前震（Guanshan foreshock）、矩震级6.9级的主震、超过14000次余震，以及来自两套宽频带台网的866个震源机制解。更多细节请参阅我们发表于TAO的研究论文（Sun et al., 2024; https://doi.org/10.1007/s44195-024-00063-9）。本研究获得的经精修的SeisBlue地震目录、震源机制解（Focal Mechanism Solution, FMS）目录，以及2001-2020年M3+级重定位的台湾中央气象署（Central Weather Administration, CWA）地震目录均在此列出。 本研究针对2022年中国台湾地区矩震级6.9级池上地震序列构建的精修深度学习地震目录，共收录5151个地震事件，包含事件发生时间、位置及对应误差、地方震级与矩震级，以及HypoDD重定位位置信息。 震源机制解（FMS）目录通过14个宽频带台站的P波初动极性数据与FPFIT程序（Reasenberg & Oppenheimer, 1985）计算得到。在1629个候选FMS解中，共有865个满足以下筛选条件：至少包含6个P波初动极性读数、F因子≤0.1（良好拟合标准为F<0.5），且走向、倾角、滑动角的误差均小于20°。上述符合要求的震源机制解已收录于附带的FMS目录中。 2001—2020年经3D HypoDD重定位的M3+级CWA地震目录：我们将HypoDD重定位程序（Waldhauser & Ellsworth, 2000）应用于包含P波与S波到时数据的台湾中央气象署（Central Weather Administration, CWA, 2012）目录，最终得到2001—2020年间台湾东部地区的5862个M3+级地震事件。本目录所采用的三维速度模型源自Kuo-Chen等人（2012）提出的区域速度模型。