Magnetotelluric impedances of Tenerife and Balearic Islands calculated to model the Geomagnetically Induced Currents (GIC)

These datasets contain the magnetotelluric (MT) impedances calculated from the electrical resistivity models of Tenerife Island (Canary Islands) and Balearic Islands. The Tenerife model was obtained from the 3D inversion of 148 MT sites (Piña-Varas et al. 2014). Model responses have been computed at 339 locations regularly distributed over the island, spaced about 3.3 km apart, in a period range between 0.1 and 10^5 s. The 3-D lithospheric model for the Balearic islands was built based on the crustal and lithospheric information (Ayala et al. 2015) and using the resistivity values from Broad Band MT data in Majorca Island (Pous et al.,1995) as a constraint. The full impedances have been computed at each cell of the model for the inland locations, and along the submarine line cable locations, in both cases spaced about 2 km apart, for periods from 0.1 s to 10^5 s.

本数据集包含由特内里费岛（加那利群岛）与巴利阿里群岛的电阻率模型计算得到的大地电磁（magnetotelluric, MT）阻抗。特内里费岛的电阻率模型源自对148个大地电磁测点的三维反演（Piña-Varas等，2014）；该模型的响应已在全岛均匀分布的339个测点处计算得到，测点间距约3.3 km，周期范围覆盖0.1 s至10^5 s。巴利阿里群岛的三维岩石圈模型基于地壳与岩石圈相关资料（Ayala等，2015）构建，并以马略卡岛的宽频大地电磁数据（Pous等，1995）获取的电阻率值作为约束条件；针对该模型的内陆网格单元与海底电缆沿线测点，均已计算得到全阻抗，两类测点的间距均约为2 km，周期范围覆盖0.1 s至10^5 s。