HR: 0800h
AN: S41B-0971    [Abstracts]
TI: Analysis of Regional Seismic Waveforms From Mining Explosions in the United States and Russia
AU: * Renwald, M D
EM: mrenwald@smu.edu
AF: Southern Methodist University Department of Geological Sciences, POB 750395, Dallas, TX 75275-0395 United States
AU: Arrowsmith, S J
EM: sarrowsmith@gmail.com
AF: University of California, San Diego Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0225 United States
AU: Stump, B W
EM: bstump@mail.smu.edu
AF: Southern Methodist University Department of Geological Sciences, POB 750395, Dallas, TX 75275-0395 United States
AU: Hedlin, M
EM: hedlin@epicenter.ucsd.edu
AF: University of California, San Diego Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0225 United States
AB: Mining explosions provide an opportunity to separate the source and regional path effects on observed seismic waveforms. We study mining explosions and their accompanying regional seismic waveforms in two separate regions, the continental United States and the Altai-Sayan region in Russia. The US is chosen as a study area because: (1) significant ground truth information already exists; (2) high-quality broadband data for both delay-fired and contained single-fired explosions are readily available; (3) multiple, high-performance regional arrays already exist or are planned; and (4) the US can be divided into two distinct regions of propagation path - high attenuation in the west and low attenuation in the east. We have assembled a preliminary database which takes advantage of the aforementioned characteristics and includes mining explosions from copper, coal, and iron mines in Arizona, Wyoming, and Minnesota, as well as nearby shallow low-magnitude earthquakes. The second region of study, the Altay-Sayan in Russia, is chosen because it is one of the largest and most active mining trends in the world. The Altay-Sayan is monitored both by single stations and arrays in the IMS and the GSN as well as the high-density regional Altay-Sayan Seismological Expedition (ASSE) network. The Russian portion of the database contains seismic waveforms from 500 known mine blasts in the Altai-Sayan using five stations in the IMS and GSN seismic networks: ZAL, MAKZ, KURK, BRVK and TLY and will be complimented with data from the ASSE seismic network in the near future. By utilizing these waveform databases, we aim to characterize the regional propagation path effects in both study areas and to link the recorded waveforms to the known physical source processes. Initial investigation of source effects manifested in waveforms shows large differences in regional amplitudes due to both source timing and explosion geometry.
DE: 7219 Nuclear explosion seismology
DE: 7299 General or miscellaneous
DE: 7203 Body wave propagation
SC: Seismology [S]
MN: 2004 AGU Fall Meeting