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Author-submitted data information


ID 329
Title Single- and two-station Pn amplitude data obtained from the China National Digital Seismic Network (CNDSN), Global Seismic Network (GSN) and Full-Range Seismograph Network (F-net)
Creator Geng Yang
Subject Seismic Pn amplitude data
Publisher Xiukuan Zhao
Description To explore the uppermost mantle Pn-wave attenuation and its implications into back-arc opening of the Japan Sea, we collected the vertical component waveforms of 473 crustal earthquakes occurred in and around the Japan Sea during February 2009 and August 2019 with magnitudes between 4.1 and 6.7, and 6 North Korean nuclear explosions during October 2006 and September 2017, which were recorded at 242 stations and obtained from the China National Digital Seismic Network (CNDSN), Global Seismic Network (GSN) and Full-Range Seismograph Network (F-net). We performed a Pn attenuation tomography based on the single- and two-station Pn amplitude data. To obtain the spectral Pn amplitudes, we sampled Pn waveforms in a 0.7 km/s group velocity window around the IASP91 first arrival time, calculated the Fourier spectra and corrected for noises using the pre-P recordings. A signal-to-noise ratio (SNR) of 2.0 was used as a criterion for Pn data selection, and the amplitudes of the Pn signal were then obtained after removing the noise. The two-station Pn amplitude ratios were calculated for the roughly aligned triples of event and station-pair. The resulting single-station amplitudes and two-station amplitude ratios were provided in this Data Repository.
Contributor Lian-Feng Zhao, Xiao-Bi Xie, Xi He, Yan Lü, Zhen-Xing Yao
Date October 2006- August 2019
Type The Pn amplitudes were sampled at 42 frequencies distributed log-evenly between 0.5 and 20.0 Hz, and therefore the spectral Pn amplitude data were provided in 42 separated files, with each file corresponding to one frequency indicated by the double-digit number in the name of the file.
Format All Pn amplitude data, including single-station amplitudes and two-station amplitude ratios, were stored in the ASCII Sott.*.b.dat files. The correspondence between the frequency and the double-digit number can be looked up in the file ‘frequency.txt’. The sott.*.b.dat files consist of header lines and data lines. Natural number and zero value occupy the 4th and 5th columns, respectively, which indicates that the current line is the header line for single-station data, where natural number is the sequence number of the recorded event, with the first two columns being the longitude and latitude of the recorded event, 3rd column being the number of lines of the following station data. The header lines for single-station data are immediately followed by data lines, with the columns successively being the longitude and latitude of the recording station, Pn amplitude, geometric spreading term, zero (sign for non-event) and sequence number of the recording station. In contrast, zero and natural number occupy the 4th and 5th columns, respectively, which indicates that the current line is the header line for two-station data, where natural number is the sequence number of the recording station, with the first two columns being the longitude and latitude of the station location, 3rd column being the number of lines of the following two-station data. The header lines for two-station data are immediately followed by data lines of two-station data, with the columns successively being the longitude and latitude of the in-between station, inter-station ratio of Pn amplitude, geometric spreading term, zero (non-event) and sequence number of the in-between station.
URL http://www.geophys.ac.cn/ArticleData/20211201PnAmplitudeData.zip
DOI 10.12197/2021GA030
Source
Language eng
Relation
Coverage
Rights China Earthquake Network Center (CENC), Incorporated Research Institutions for Seismology (IRIS), Full-Range Seismograph Network (F-net), and Institute of Geology and Geophysics, Chinese Academy of Sciences.