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Title: Regional characterization of Western China-II

Abstract

As part of the CTBT Research and Development regional characterization effort, geological, geophysical, and seismic data are being assembled and organized for inclusion in a knowledge base for China. The authors have continued their analysis using data form the station WMQ of the Chinese Digital Seismic Network (CDSN) and the IRIS station AAK. They are also acquiring and analyzing data from stations that are designated as (or near a designated) primary or secondary CTBT monitoring station. Regional seismograms are being analyzed to construct travel time curves, velocity models, attenuation characteristics, and to quantify regional propagation effects such as phase blockages. Using locations from the USGS Preliminary Determination of Epicenters (PDE) they have identified Pn, Pg, Sn, and Lg phases, constructed travel time curves, and estimated apparent velocities using linear regression. Amplitudes for the seismic phases have been measured using bandpassed waveforms and a series of magnitude relations have been determined for Western China. Studies of path specific propagation efficiency of the seismic phases have mapped blockages and also identified a possible set of observations that can be used to identify intermediate depth (> 100 im) seismic events in the Pamir-Hindu Kush seismic zone. Chinese seismicity catalogs from the USGS andmore » Chinese State Seismological Bureau (SSB) are being used to identify and obtain seismic data (including mine seismicity) and information for lower magnitude events. Clustering analysis has been used to identify seismicity clusters in space with origin times that are distributed during daylight hours which suggest mining operations. These clusters are being investigated with imagery to attempt to identify precise mine locations.« less

Authors:
; ; ;  [1]
  1. Los Alamos National Lab., NM (United States). Geophysics Group
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
378805
Report Number(s):
LA-UR-96-2434; CONF-9609185-13
ON: DE96014234; TRN: AHC29620%%17
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 18. Seismic Research symposium on monitoring a Comprehensive Test Band Treaty (CTBT), Annapolis, MD (United States), 4-6 Sep 1996; Other Information: PBD: [1996]
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; 35 ARMS CONTROL; NON-PROLIFERATION TREATY; VERIFICATION; CHINA; SEISMIC SURVEYS; NUCLEAR EXPLOSION DETECTION; SEISMIC DETECTION; SEISMIC ARRAYS; SEISMIC WAVES; WAVE PROPAGATION; PATTERN RECOGNITION

Citation Formats

Randall, G E, Hartse, H E, Phillips, W S, and Taylor, S R. Regional characterization of Western China-II. United States: N. p., 1996. Web.
Randall, G E, Hartse, H E, Phillips, W S, & Taylor, S R. Regional characterization of Western China-II. United States.
Randall, G E, Hartse, H E, Phillips, W S, and Taylor, S R. 1996. "Regional characterization of Western China-II". United States. https://www.osti.gov/servlets/purl/378805.
@article{osti_378805,
title = {Regional characterization of Western China-II},
author = {Randall, G E and Hartse, H E and Phillips, W S and Taylor, S R},
abstractNote = {As part of the CTBT Research and Development regional characterization effort, geological, geophysical, and seismic data are being assembled and organized for inclusion in a knowledge base for China. The authors have continued their analysis using data form the station WMQ of the Chinese Digital Seismic Network (CDSN) and the IRIS station AAK. They are also acquiring and analyzing data from stations that are designated as (or near a designated) primary or secondary CTBT monitoring station. Regional seismograms are being analyzed to construct travel time curves, velocity models, attenuation characteristics, and to quantify regional propagation effects such as phase blockages. Using locations from the USGS Preliminary Determination of Epicenters (PDE) they have identified Pn, Pg, Sn, and Lg phases, constructed travel time curves, and estimated apparent velocities using linear regression. Amplitudes for the seismic phases have been measured using bandpassed waveforms and a series of magnitude relations have been determined for Western China. Studies of path specific propagation efficiency of the seismic phases have mapped blockages and also identified a possible set of observations that can be used to identify intermediate depth (> 100 im) seismic events in the Pamir-Hindu Kush seismic zone. Chinese seismicity catalogs from the USGS and Chinese State Seismological Bureau (SSB) are being used to identify and obtain seismic data (including mine seismicity) and information for lower magnitude events. Clustering analysis has been used to identify seismicity clusters in space with origin times that are distributed during daylight hours which suggest mining operations. These clusters are being investigated with imagery to attempt to identify precise mine locations.},
doi = {},
url = {https://www.osti.gov/biblio/378805}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 1996},
month = {Tue Oct 01 00:00:00 EDT 1996}
}

Conference:
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