Author-submitted data information
| ID | 710 |
| Title | Single- and two-station Pn amplitude data and a broadband Pn attenuation model in and around the Caribbean |
| Creator | Bao-Zhu You |
| Subject | Pn amplitude, Broadband Model, Attenuation Model, Caribbean |
| Publisher | Xiukuan Zhao |
| Description | The Single- and two-station Pn amplitude data were obtained in the Caribbean from the Incorporated Research Institutions for Seismology Data Management Center. Thus, a broadband Pn attenuation model was accordingly constructed. To explore Pn-wave attenuation in the uppermost mantle beneath the Caribbean, we collected vertical component waveforms of 533 crustal earthquakes that occurred in and around the Caribbean between January 2000 and May 2022, with magnitudes ranging from 4.3 to 6.5. We performed a Pn attenuation tomography based on the single- and two-station Pn amplitude data. We extracted Pn signals using a 0.7 km/s group-velocity window around their first arrival times, calculated the Fourier spectra, and corrected for noise using the pre-P recordings. A signal-to-noise ratio (SNR) of 2.0 was used as the criterion for selecting Pn data, and the amplitudes of the Pn signal were then determined after removing the noise. The two-station Pn amplitude ratios were calculated for the roughly aligned triples of event and station pairs. The resulting single-station amplitudes and two-station amplitude ratios, along with a constructed Pn attenuation model, are provided in this Data Repository. |
| Contributor | Lian-Feng Zhao, Hong-Yi Li, Xiao-Bi Xie, Carlos A. Vargas, Bao-Feng Tian, Zhen-Xing Yao |
| Date | January 2000 and May 2022 |
| Type | The Pn amplitudes were sampled at 42 frequencies distributed logarithmically evenly between 0.5 and 20.0 Hz; therefore, the spectral Pn amplitude data were provided in 42 separate files, each corresponding to one frequency, indicated by the double-digit number in the file name. 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. A zero value in the 5th column indicates that the current line is the header line for single-station data, with the first two columns representing the longitude and latitude of the recorded event, the 3rd column indicating the number of lines of the following data, and the 4th column representing the sequence number of the recorded event. The header lines for single-station data are immediately followed by lines of single-station data, with the columns successively representing the longitude and latitude of the recording station, Pn amplitude, geometric spreading term, a value of ‘0’ (meaningless), and the sequence number of the recording station. A zero value in the 4th column indicates that the current line is the header line for two-station data, with the first two columns representing the longitude and latitude of the recording station, the 3rd column indicating the number of lines of the following data, and the 5th column representing the sequence number of the recording station. The header lines for two-station data are immediately followed by lines of two-station data, with the columns successively representing the longitude and latitude of the intermediate station, the inter-station ratio of Pn amplitude, the geometric spreading term, a value of ‘0’ (meaningless), and the sequence number of the intermediate station. The Pn attenuation model for the Caribbean was stored in the QPnModel.txt files, with the longitude, latitude, frequency, and Q columns successively arranged. |
| Format | ASCII format with suffixes as .dat |
| URL | http://www.geophys.ac.cn/ArticleData/20250401PnQmodelCaribbean.zip |
| DOI | 10.12197/2025GA011 |
| Source | |
| Language | Eng |
| Relation | |
| Coverage | |
| Rights | China University of Geosciences, Beijing, China Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China Incorporated Research Institutions for Seismology Data Management Center |