Seismic data collected in East Antarctica with broadband seismometers, 2015 onwards

Seismic data collected with broadband seismometers at rock outcrops as part of AAS 4318. Seven new sites were established (sites BHIL, CAD1, CAD2, CAD3, CAD4, CAD5 and CAD6) and measurements at a previously established site (DAVI) was recommenced. The sites were deployed continuously, although measurements were intermittent based on power restrictions and hardware performance issues.Approximate site locations are given below in units of decimal degrees (WGS84) as (latitude longitude) pairs:CAD1 approximate coordinates only - Carey Nunatak - as no data yet downloadedCAD2 -68.566510 86.100627 Mt Brown, new site established under this projectCAD3 -66.521103 96.363667 Gillies Island, new site established under this projectCAD4 -67.419656 99.143785 Mt Strathcona, new site established under this projectCAD5 -66.552475 107.764024 Snyder Rocks, new site established under this projectCAD6 -66.789282 120.990964 Chick Island, new site established under this projectBHIL -66.251024 100.599006 Bunger Hills site, new site established under this projectSite changes============Instruments were deployed continuously but did not operate continuously due to solar powering of the instruments with a small battery array.Due to instrument failures, the recorders at CAD5 and BHIL were doubled in some periods. The recorder at DAVI was also doubled. Data sets:=========Seismic data is stored in miniSEED format, one stream for each channel. One file for each day with data recorded. If the recording is interrupted, additional files are generated for that day. The file name contains station name and starting time information, e.g. CAD3_2016_12_09T19_10_06_840000Z.BHESSSS_YYYY_MM_DDTHH_mm_ss_mmmmmmZ.BHCWhere S is a four-letter station nameYYYY is yearMM is monthDD is the day (in the month)HH is the hour (0-24)mm is minutess is secondmmmmmm is milliseconds, padded with 0’sC (last in file extension) is the orientation of the channel. N = North-South E – East-West Z – Up-DownMiniSEED is the subset of the SEED standard that is used for time series data. Very limited metadata for the time series is included in miniSEED beyond time series identification and simple state-of-health flags. In particular, geographic coordinates, response/scaling information and other information needed to interpret the data values are not included.Time series are stored as generally independent, fixed-length data records which each contain a small segment of contiguous series values.Alongside the time series files, are two spreadsheets containing teleseismic event data, that could be of utility in a reconnaissance of the time series data.1) Earthquake list, Casey-Davis seismic deployment, global teleseismic earthquakes, greater than or equal to magnitude 6.5.2) Earthquake list, Casey-Davis seismic deployment, regional teleseismic earthquakes, greater than or equal to magnitude 6.0. Anyone working with seismic data is likely to be familiar with the abbreviations in the earthquake list files, otherwise, refer to the IRIS Data Management Centre, https://ds.iris.edu/ds/nodes/dmc/tools/#data_types=events.

本数据集为AAS 4318项目中，于岩石露头（rock outcrop）处使用宽频地震仪（broadband seismometer）采集的地震数据。本次项目新建了7个观测站点（BHIL、CAD1、CAD2、CAD3、CAD4、CAD5及CAD6），并重启了已建成站点DAVI的观测工作。所有站点均完成部署，但受供电限制与硬件性能问题影响，观测数据存在间断。

各站点近似位置以十进制度（WGS84坐标系）给出，格式为（纬度 经度）：
CAD1：仅提供近似位置——位于凯里努纳塔克（Carey Nunatak）——暂未下载其观测数据
CAD2：南纬-68.566510、东经86.100627，位于布朗山（Mt Brown），为本项目新建站点
CAD3：南纬-66.521103、东经96.363667，位于吉利斯岛（Gillies Island），为本项目新建站点
CAD4：南纬-67.419656、东经99.143785，位于斯特拉斯科纳山（Mt Strathcona），为本项目新建站点
CAD5：南纬-66.552475、东经107.764024，位于斯奈德岩（Snyder Rocks），为本项目新建站点
CAD6：南纬-66.789282、东经120.990964，位于奇克岛（Chick Island），为本项目新建站点
BHIL：南纬-66.251024、东经100.599006，位于邦杰丘陵（Bunger Hills），为本项目新建站点

站点运行变更说明
仪器虽持续部署，但因采用小型电池阵列配合太阳能供电，实际运行存在间断。因仪器故障，CAD5与BHIL站点的记录仪在部分时段采用了双机备份配置，DAVI站点的记录仪亦采用了双机备份。

数据集说明
地震数据以miniSEED（miniSEED）格式存储，每个通道对应一条数据流。每日采集的数据单独存储为一个文件；若当日观测中断，则当日会生成多个数据文件。
数据文件名包含站点名称与起始时间信息，示例格式为：[站点名]_[YYYY]_[MM]_[DD]T[HH]_[mm]_[ss]_[mmmmmm]Z.[C]，例如CAD3_2016_12_09T19_10_06_840000Z.BHE。其中：
S为4位字母组成的站点名称；YYYY为年份；MM为月份；DD为当月日期；HH为小时（0-24制）；mm为分钟；ss为秒；mmmmmm为毫秒，不足位数时补零；文件扩展名末尾的C代表通道方位：
N = 南北向
E = 东西向
Z = 上下向

miniSEED是SEED（SEED）标准中用于时序数据的子集格式。miniSEED中仅包含极有限的时序元数据，仅支持时序标识与简单的健康状态标记，未包含地理坐标、响应/缩放信息及其他用于解析数据数值的必要元数据。
时序数据以独立的定长数据记录形式存储，每条记录包含一段连续的时序数值片段。

除时序数据文件外，本数据集还包含两份远震事件数据电子表格，可用于时序数据的初步探查分析：
1. 凯西-戴维斯地震观测部署项目全球远震地震目录：震级≥6.5的全球远震事件
2. 凯西-戴维斯地震观测部署项目区域远震地震目录：震级≥6.0的区域远震事件

任何从事地震数据处理的人员通常都熟悉地震目录文件中的缩写术语，若有疑问可参考IRIS数据管理中心（IRIS Data Management Centre）的相关文档：https://ds.iris.edu/ds/nodes/dmc/tools/#data_types=events。