WDC for Geophysics, Beijing(中国地球物理学科中心)

Author-submitted data information

ID 306
Title Phase velocity dispersion curves of ambient noise and phase velocity of teleseismic surface wave from WDLC seismic array
Creator Ying Chen
Subject seismic data
Publisher Xiukuan Zhao
Description With the expectation of providing a high-resolution image of the crustal and upper mantle velocity structure of Wudalianchi volcano, we deployed new dense seismic stations (WDLC seismic array) from June 2015 to November 2016 in the Wudalianchi volcanic field and adjacent region with the Institute of Crustal Dynamics, China Earthquake Administration. The WDLC seismic array contains 88 stations that are equipped with several types of broadband seismometers, including Güralp CMG-3ESP and 3T, Nanometrics Trillium 120PA and compact seismometers. The average interstation distance is approximately 30 km. For ambient noise tomography, after decimating to one sample per second and separated into 1-day segments for each station, performing demean, de-trending, removing effective response and the running absolute mean normalization method and spectrum whitening, cross-correlation functions were carried out on the daily data between all possible station pairs of WDLC array and were stacked to improve the signal-to-noise, and then phase velocity dispersion curves were acquired. For The two-plane surface wave tomography (TPWT) method, we selected earthquakes with magnitudes (Ms) greater than 5.5, epicentral distances between 30° and 150° and focal depths less than 100 km. After removing instrumental responses, we filtered the vertical components of Rayleigh waves with a series of narrow-bandpass 0.01 Hz, four-pole, double-pass Butterworth filters and obtained the phase velocity and amplitude on each earthquake at each period.
Contributor Ying Chen, Yinshuang Ai, Mingming Jiang, Yingjie Yang, Jianshe Lei
Date June 2015 - November 2016
Type In folder ANT, name of each COR*.DISP.1 file includes name of station A and name of station B. The columns in each file are the row number, central periods, apparent periods, group velocities, phase velocities, SNR and maximum half width. In folder TPWT is a series of folders named by period. The columns of each txt file are longitude, latitude, time, phase velocity, and amplitude.
Format Ascii files, can be read using SAC, Obspy, MATLAB, et al.
URL http://www.geophys.ac.cn/ArticleData/20210208SeismicDataByChen.zip
DOI 10.12197/2021GA007
Language eng
Rights Institute of Geology and Geophysics, Chinese Academy of Sciences