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Author-submitted data information


ID 300
Title Water level observation data obtained from CENC (China Earthquake Networks Center)
Creator Yan Zhang
Subject Groundwater observation data (water level)
Publisher Xiukuan Zhao
Description Groundwater data of well Gaocun (Tianjin province) is selected in this study. The well is located at longitude 116.87° and latitude 39.62°. The observation data comes from the analog and digital observation instruments of the Gaocun groundwater station of the China Earthquake Networks Center. The water-level data is of high quality, and the selection is based on the catalogs provided by provincial (Tainjin) earthquake administrations. Besides, this selected well is away from the coast to minimize the effects of ocean tides.
Contributor Yan Zhang, Li-yun Fu, Qiu-ye Yang, Chengjun Feng and Yuchuan Ma
Date 1-The tidal response analysis (water level data) are from January 1st, 1981 to May 9th, 2020. 2-Two large earthquakes are analyzed: a-for the 2008 Wenchuan earthquake, data calculations are from February 1st, 2008 to August 31th; b-for the 2011 Tohoku earthquake, data calculations are from December 1st, 2010 to June 30th, 2011.
Type Since the year 1981, the SW40-1 (Chong-Qing) analog observation water-level instrument is used to document the water-level change in this well, which has a resolution of 1 mm, and sampling rate of 1 per hour. Since the year 2001, the LN-3A digital water-level instrument is used to document the water-level change in this well, which has an observation accuracy of ≤ 0.2% full scale, resolution of 1 mm, and sampling rate of 1 per minute. In order to be uniform, we used the hourly data from January 1st, 1981 to May 9th, 2020, and resampled into the minute-data to do calculations.
Format the *.DIG format data (can be read directly using the software of MATLAB, et al.) has been stored in the files. Data file 1 (1981010100--2019032823) provided by the Tianjin province to the CENC (in the matrix form): the first number indicates the time (year-month-day), and the following data is the water level (unit-m), 24 data per day, thus each data is the hourly data; Data file 2 (2019032900--2020050923) provided by CENC (in the form of 2 columns): the first column indicates the time (year-month-day-hour), and the second column is the water level data (unit-m), thus each data is the hourly data. During the analysis of the paper, in order to calculate the phase shifts and the amplitude ratios, we resampled the hourly-data into the minute-data.
URL http://www.geophys.ac.cn/ArticleData/20210104GroundwaterDataByZhang.zip
DOI 10.12197/2021GA001
Source
Language eng
Relation
Coverage
Rights China Earthquake Networks Center