Dataset for ambient noise tomography of Andi Geothermal Field in central Zhejiang province, China

Ambient noise dataset collected from Andi town area with the diameter of survey zone expands as close as 5km. Total 192 nodes (Fairfield Nodal Zland-3C) equipped with 5Hz three-component geophones were used to build a dense seismic network with the average adjacent station interval about 300m. The raw noise dataset was firstly low pass filtered and then decimated to 50Hz. For each station, the continuous noise records were divided into 6945 segments using 1-min-long time windows without overlap.

Only Vertical component ambient noise records were used to retrieve fundamental-mode Rayleigh wave dispersion signals and travel-time data. These datasets drive the tomographic studies of geothermal filed.

The datasets consist of four parts: 1, The decimated ambient noise records of eight stations used for spectrograms saved in matlab format; 2, Dispersion energy matrix of all station pairs saved in matlab format; 3, Travel time data were listed in three column (source, receiver, time respectively); 4, Coordinates of all stations in our seismic networks.

More data used in Cheng et al., 2021 (High-resolution ambient noise imaging of geothermal reservoir using 3C dense seismic nodal array and ultra-short observation) could be addressed to F. Cheng (email: [e-mail]).

本数据集由安德镇区域收集的环噪声构成，调查区域直径扩展至5公里。共使用192个节点（费尔菲尔德节点Zland-3C）配备5Hz三分量地震计，构建了一个密集的地震网络，相邻台站平均间隔约为300米。原始噪声数据集首先经过低通滤波，然后降采样至50Hz。对于每个台站，连续噪声记录被划分为6945个段，每个时间段为1分钟，无重叠。仅使用垂直分量环噪声记录来检索本征模态瑞利波频散信号和旅行时间数据。这些数据集驱动了地热场层析研究。数据集包含四个部分：1、用于谱图的八个台站降采样环噪声记录，以matlab格式保存；2、所有台站对的频散能量矩阵，以matlab格式保存；3、旅行时间数据列于三列（分别为震源、接收器和时间）；4、我们地震网络中所有台站的坐标。在Cheng等，2021年（使用3C密集地震节点阵列和超短观测的高分辨率地热储环噪声成像）中使用的更多数据可致F. Cheng（电子邮箱：[e-mail]）查询。