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Wenchuan Earthquake Aftershocks Classification Dataset

ZHAO Ming1CHEN Shi1David A Yuen2
1 Institute of Geophysics,China Earthquake Administration,Beijing 100081,China2 Dept. of Applied Physics and Applied Mathematics,Columbia University,New York,10027,USA


Published:May 2020

Visitors:7531       Data Files Downloaded:695      
Data Downloaded:171211.66 MB      Citations:

Key Words:

aftershocks,Wenchuan Earthquake,classification,Chinese Journal of Geophysics


After the Wenchuan magnitude 8.0 Earthquake occurred on May 12, 2008, aftershocks are very frequent. How to quickly and accurately identify aftershocks is critical for earthquake monitoring and early warning. Based on the aftershock waveforms recorded by 16 broadband seismic stations around the Longmenshan fault zone in Wenchuan and its neighboring areas (30°N-33.5°N, 102°E-106°E) from July to September 2008, the Wenchuan earthquake (2008.5.12) aftershock classification dataset was developed, where 9,909 event waveform segments from 1,765 aftershock events (1.0-6.6 level) were manually selected as positive samples, and 10,939 noise waveforms were randomly intercepted from the remaining continuous waveforms as negative samples. The dataset includes, (1) Positive samples; (2) signal-to-noise ratio (SNR) of positive samples (SNR_positive.txt); (3) Negative samples; (4) the SNR of negative samples (SNR_negative.txt); (5) stations around Wenchuan (; (6) location results of aftershock events (Epicenter_Wenchuan.dat). The dataset is archived in .dat, .data, .txt, and .SLIST formats, with a data size of 3.14 GB (compressed to five data files with data size of 1.20 GB). The analysis paper related to this dataset has been published in Chinese Journal of Geophysics, Vol. 62, No. 1, 2019, and the related algorithms have been open sourced to ConvNetQuake.

Foundation Item:

National Natural Science Foundation of China (41774090, 41804047); Institute of Geophysics, China Earthquake Administration (DQJB1801)

Data Citation:

ZHAO Ming, CHEN Shi, David A Yuen. Wenchuan Earthquake Aftershocks Classification Dataset[J/DB/OL]. Digital Journal of Global Change Data Repository, 2020.

Data Product:

ID Data Name Data Size Operation
1 EpicenterSNR_Wenchuan20080512.rar 211.73KB
2 Negative_sample_part01.rar 313419.00KB
3 Negative_sample_part02.rar 318640.39KB
4 Positive_sample_part01.rar 320374.57KB
5 Positive_sample_part02.rar 314157.57KB