Raw seafloor magnetotelluric data acquired over the Mendocino Fracture Zone, 2017-2018

These passive raw seafloor electric and magnetic field time series data files were acquired in 2017 and 2018 using SIO Mk III OBEM seafloor magnetotelluric/electromagnetic sensors deployed during the Mendocino Fracture Zone project (https://marineemlab.ucsd.edu/Projects/Mendocino/) in the eastern Pacific Ocean, across the Mendocino fracture zone at 131.5 degrees west longitude. The instruments, data format, and playback software are described at https://marineemlab.ucsd.edu/instruments/. The OBEM instruments were deployed during Rvelle cruise RR1719. The data files are in the Scripps EM data logger binary format. The fifth channel recorded is seismic/pressure, either DPG or hydrophone. The data files were generated as part of the project called The Mendocino Fracture Zone: A natural laboratory to study aging of the lithosphere and asthenosphere. Funding was from NSF award OCE-1736590 and UC ship funds.

本数据集为2017至2018年采集的无源原始海底电场与磁场时间序列数据，采集工作依托门多西诺断裂带项目（https://marineemlab.ucsd.edu/Projects/Mendocino/）开展，于东太平洋西经131.5°横跨门多西诺断裂带的海域完成，所用设备为SIO Mk III型OBEM海底大地电磁（magnetotelluric）/电磁传感器。该仪器、数据格式及回放软件的详细说明可参见网址https://marineemlab.ucsd.edu/instruments/。本次OBEM仪器的布放工作搭载于"雷维尔"号研究船航次RR1719完成。数据文件采用斯克里普斯电磁数据记录仪二进制格式存储，其第五通道记录地震/压力数据，可采用差动压力计（DPG）或水听器进行采集。本数据集为"门多西诺断裂带：研究岩石圈与软流圈老化的天然实验室"项目的产出成果之一，研究工作由美国国家科学基金会（NSF）项目OCE-1736590以及加州大学船务经费资助。