Silixa-Fairfield Global DAS Month 2023 data

The Silixa-Fairfield Global DAS Month data were acquired on a pre-installed telecommunication fiber-optic cable operated by 3 Rivers Communications located in Fairfield, Montana USA. From February 1st to February 29th, 2023, a Silixa iDAS-MG interrogator unit was connected to dark fiber with an optical pathway length of 28.4 km. The cable is shallow buried (~1 m) alongside rural highways. Data were acquired with a gauge length of 30 m, at a sampling frequency of 400 Hz.

The data, available on PubDAS in HDF5 format, covers a 1-hour window following source times of 156 reported global teleseismic events of magnitude 5 or larger as catalogued by the USGS (https://www.usgs.gov/programs/earthquake-hazards/earthquakes). The data were downsampled to 100 Hz and resampled to a spatial resolution of ~20 m. Additionally, continuous data downsampled to 50 Hz are provided for the 24-hour period of February 14th, 2023.

This network represents one of the DAS systems used during the Global DAS Month monitoring campaign, organized by researchers of the DAS community (Wuestefeld A., Z. Spica, and K. Aderhold, 2023).

Silixa-Fairfield全球分布式声学传感（Distributed Acoustic Sensing，简称DAS）月度数据集采集自美国蒙大拿州费尔菲尔德市由3 Rivers Communications运营的预部署通信光缆。2023年2月1日至2月29日期间，采用Silixa iDAS-MG型解调仪单元连接至长度为28.4千米的暗光纤开展数据采集。该光缆以约1米的浅埋方式铺设于乡村公路旁，本次采集设置30米的标距长度，采样频率为400赫兹。
该数据集以HDF5格式存储于PubDAS平台，涵盖美国地质调查局（United States Geological Survey，简称USGS）收录的156个震级≥5级的全球远震事件发生后1小时的窗口数据。数据已被下采样至100赫兹，并重采样至约20米的空间分辨率。此外，还提供了2023年2月14日全天、下采样至50赫兹的连续观测数据。
该观测网络是由DAS领域研究者发起的全球DAS月度（Global DAS Month）监测活动所使用的DAS系统之一，该活动由Wuestefeld A.、Z. Spica与K. Aderhold于2023年组织实施。