Fundamental mode Rayleigh wave group velocity dispersion data
Data files
Jun 21, 2024 version files 120.68 MB
-
LR_dispersion_2022.tgz
4.08 MB
-
LR_waveform_2022.tgz
116.60 MB
-
README.md
1.92 KB
Abstract
Fundamental-mode Rayleigh-wave group-velocity dispersion curves have been computed from 14706 regional waveforms (ray-paths) sampling India, Himalaya, Tibet and surrounding regions. These have been combined through ray-based travel-time tomography to compute 2D group-velocity maps at periods between 10 and 120~s. These ray-paths sample the region with unprecedented density and uniformity. The 2D maps have a lateral resolution of 3\deg x3\deg, comparable to the regional geology. The dispersion curves, at each 1\deg\ spaced node-points, are inverted to obtain a 3D isotropic shear-wave velocity structure.
This archive contains:
- Earthquake waveform data used to compute the Rayleigh-wave (LR) fundamental-mode group-velocity dispersion
- The computed dispersion files which have been used for performing the tomography (2D LR maps)
- LR_waveform_2022.tgz - Waveform data
To extract (on linux):
$ tar xvzf LR_waveform_2022.tgz
$ cd LR_waveform_2022
Extracts as LR_waveform_2022/IISERK_Data
cut_v_2011221115022_IT_YUMT.BHZ.xy
cut_v_2015325001543_IK_WANI.BHZ.xy
LR_waveform_2022/INCOIS_Data
cut_v_2008269014711_IM_KUDL.BHZ.xy
cut_v_2012102104310_IM_SHL.HHZ.xy
LR_waveform_2022/IRIS_Data
cut_v_2005088061613_G_HYB.BHZ.xy
cut_v_2009222195539_XW_GHDI.BHZ.xy
Total of 14706 waveform data files (corresponding to the earthquake-station raypaths)
File Format: ASCII XY file
Column-1: Time
Column-2: ground velocity amplitude in m/s
File name convention:
cut_velocity-trace_event-ID_Network-code_Station-code.Component.xy
e.g. cut_v_2010105142637_IT_CHTG.BHZ.xy
cut: waveform is windowed for the LQ fundamental-mode used for the analysis
MFA: Multiple Filter Analysis is the procedure used for extraction of the dispersion curve
v: velocity-trace
2010105142637: event-ID [Origin time of event e.g. year(2010)julian-day(105)hour(14)minute(26)second(37)]
IT: Network-code
CHTG: Station-code
BHZ: Vertical Component
- LR_dispersion_2022.tgz - Dispersion data
To extract (on linux):
$ tar xvzf LR_dispersion_2022.tgz
$ cd LR_dispersion_2022.tgz
Extracts as LR_dispersion_2022
2018333202144_IU_CHTO_BHZ.dat
2011261124051_IM_BKN_HHZ.dat
File name convention:
event-ID_Network-code_Station-code_Component.dat
eg. 2018333202144_IU_CHTO_BHZ.dat
event-ID: 2018333202144
Network-code: IU
Station-code: CHTO
Component: BHZ
Data format (3 columns):
period group-velocity group-velocity-error
eg.
44 2.75948 0.22519
42 2.75374 0.21406
40 2.74863 0.20311
Updated: 20/06/2024
Waveform data was collected through field experiment. These have been processed using the multiple filter technique to extract group velocity dispersion curves.