Dataset publication for "A repeating earthquake catalog for Northern Chile"
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This is the catalog data described in "A repeating earthquake catalog for Northern Chile", published in Seismica (https://doi.org/10.26443/seismica.v4i2.1578 ). In the following, the three contained files are described: nc_repeater_list.txtThis file contains the repeating earthquake table, where events are grouped into repeater families already. Below theheader, there occur two different types of lines. The type, starting with #, contains information on the properties ofthe repeater family. The other line-type holds information on the single events. Header entries are:time : event origin timecID : cluster IDlat : event latitude or median of the sequencelon : event longitude or median of the sequencedep : event depth in km or median of the sequencemag : magnitude or average magnitude for the sequencestdmag : standard deviation of magnitudes in the sequencenumel : number of events in the sequencetd : total duration between first and last event in daystr : average inter-event timecvr : coefficient of variationslip : slip in cm or cumulative slip in cm for the whole series, where each first event is neglectedsr : average slip rate in cm/yr, note that sr may be artificially high if td or tr are very small.tccls : tectonic location identifier from Sippl et. al, 2023type : recurrence pattern type for sequences with n>3 nc_mining_cluster.txtThis file contains a list of earthquakes that fulfill the repeater criteria but bear the tectonic label M i, which standsfor mining events. They were removed from the repeater lists as they do not reflect natural seismicity. The events aregrouped into clusters similar to the repeaters. Below the header, there occur two different types of lines. The type,starting with #, contains information on the properties of the repeater family. The other line-type holds informationon the single events. Header entries are:time : event origin timecID : cluster IDlat : event latitude or median of the sequencelon : event longitude or median of the sequencedep : event depth in km or median of the sequencemag : magnitude or average magnitude for the sequencenumel : number of events in the sequencetccls : tectonic location identifier from Sippl et. al, 2023 nc_event_pairs.txtThis file contains the pairs of matches and templates from which the repeater families were constructed. Header entries are:time : event origin time of the matchtime_t : event origin time of the templatecc : list of cross correlation values at the closest available stations - sorting refers to stat columnlat : latitude of template eventlon : longitude of template eventdep : depth of template event in kmstat : stations on which the cc was computed - sorting refers to the cc columncID : cluster IDmag : magnitude of matchmag_t : event origin time
本数据集为发表于《Seismica》期刊（DOI: https://doi.org/10.26443/seismica.v4i2.1578）的《智利北部重复地震目录》（A repeating earthquake catalog for Northern Chile）所配套的目录数据。 下文将对数据集包含的三个文件分别进行说明： ### nc_repeater_list.txt 该文件存储重复地震表格，其中地震事件已按重复地震簇（repeater families）完成分组。表头下方包含两种格式的行数据：以#开头的行用于记录重复地震簇的属性信息，其余行则存储单个地震事件的详细参数。 表头字段说明如下： - time：事件发震时刻 - cID：簇编号 - lat：事件纬度，若为簇汇总数据则为序列纬度中位数 - lon：事件经度，若为簇汇总数据则为序列经度中位数 - dep：事件震源深度（单位：km），若为簇汇总数据则为序列深度中位数 - mag：事件震级，若为簇汇总数据则为序列平均震级 - stdmag：序列内震级的标准差 - numel：序列内事件总数 - td：序列内首末事件的时间总间隔（单位：天） - tr：序列内事件平均间隔时间 - cvr：变异系数 - slip：单次事件滑动量（单位：cm）或整个序列的累计滑动量（单位：cm，序列首个事件的滑动量不计入统计） - sr：平均滑动速率（单位：cm/yr），需注意：若td或tr数值极小，sr可能存在人为偏高的情况 - tccls：来自Sippl等人2023年研究的构造位置标识符 - type：事件数n>3的序列的复发模式类型 ### nc_mining_cluster.txt 该文件存储满足重复地震判定标准但被标记为构造类型M的地震事件列表，其中M代表采矿诱发地震。由于此类事件不属于天然地震活动范畴，已从重复地震目录中移除。事件同样按簇进行分组，表头下方包含两种格式的行数据：以#开头的行用于记录簇的属性信息，其余行则存储单个事件的参数。 表头字段说明如下： - time：事件发震时刻 - cID：簇编号 - lat：事件纬度，若为簇汇总数据则为序列纬度中位数 - lon：事件经度，若为簇汇总数据则为序列经度中位数 - dep：事件震源深度（单位：km），若为簇汇总数据则为序列深度中位数 - mag：事件震级，若为簇汇总数据则为序列平均震级 - numel：序列内事件总数 - tccls：来自Sippl等人2023年研究的构造位置标识符 ### nc_event_pairs.txt 该文件存储用于构建重复地震簇的匹配事件与模板事件对。 表头字段说明如下： - time：匹配事件的发震时刻 - time_t：模板事件的发震时刻 - cc：最近可用台站的互相关值列表，排序与stat列保持一致 - lat：模板事件的纬度 - lon：模板事件的经度 - dep：模板事件的震源深度（单位：km） - stat：计算互相关值的台站列表，排序与cc列保持一致 - cID：簇编号 - mag：匹配事件的震级 - mag_t：事件发震时刻
