Broadband seismic data from the Askja Caldera, Iceland, August 2023-August 2024

This dataset comprises broadband seismic data from the Askja Caldera, Iceland, which consists of ~12 months of continuous recording from August 2023-August 2024. A total of 23 Guralp 6TD and Certimus seismometers were deployed in and around the ~8km diameter caldera, with sampling rates set to 100sps. Each seismometer was buried ~30cm below the surface, and attached to a power supply consisting of 3 100Amp-hour batteries and 100 W solar panels mounted on a wooden frame. The batteries were placed in a box that sat on the supports of the solar panel frame to act as ballast, and wrapped in a plastic sheet. A GPS unit was mounted on the solar panel frame. Access to most stations is by foot, and installation was undertaken either by carrying the equipment on foot or by helicopter.
The dataset provided is in standard miniseed format, and has an accompanying dataless file for each instrument type in xml format. The miniseed data is archived in day files under the directories "2023" and "2024", while the xml files are located in the directory "dataless".
The data is of good quality, with both local earthquakes and teleseisms easily detected. The data were collected for the purposes of tracking microseismic activity associated with the recent reinflation event at Aska, and to help facilitate seismic imaging beneath the caldera using both body and surface wave tomography. The data may be of use to other scientists with an interest in earthquake seismology, imaging, and characterisation of geothermal areas near active volcanoes.
The data were collected by the University of Iceland and University of Cambridge, both of who are responsible for interpretation of the data. The archive is complete as it currently stands.
The data were converted into miniseed using a standard format that is consistent with archives stored at the IRIS DMC.

本数据集包含来自冰岛阿斯贾破火山口（Askja Caldera）的宽频带地震数据（broadband seismic data），记录时长约12个月，涵盖2023年8月至2024年8月的连续观测序列。本次共布设23台Guralp 6TD与Certimus型地震仪（seismometers），布设范围覆盖直径约8公里的破火山口及其周边区域，采样率设为100sps。每台地震仪均埋设于地表下约30厘米处，配套供电系统包含3块100安时电池与100瓦太阳能板，均安装于木质支架上。电池置于专用箱内，放置于太阳能板支架的基座上以充当压舱物，外部以塑料薄膜包覆。太阳能板支架上还安装了GPS单元。多数台站仅可通过步行抵达，设备安装采用徒步背负或直升机吊运两种方式完成。
本数据集采用标准miniseed格式存储，且为每类仪器配套提供xml格式的dataless文件。miniseed格式数据按日文件归档，存储于"2023"与"2024"两个目录下，xml格式文件则存放于"dataless"目录中。
该数据集质量优良，可便捷识别本地地震与远震事件（teleseisms）。本次数据采集旨在追踪与阿斯贾近期火山重新充气事件相关的微地震活动，并助力借助体波与面波层析成像（body and surface wave tomography）技术开展破火山口下方的地震成像研究。本数据集亦可惠及其他关注地震学、成像研究以及活火山周边地热区域特征刻画的科研人员。
本数据集由冰岛大学与剑桥大学联合采集，两家机构均负责数据的解译工作。截至当前，该数据归档完整无缺。
本数据集采用与IRIS数据管理中心（IRIS DMC）存储档案一致的标准格式完成miniseed格式转换。