HR: 1340h
AN: S53A-1025    [Abstracts]
TI: West Coast and Alaska Tsunami Warning Center Global Earthquake Detection System
AU: * Huang, P Y
EM: paul.huang@noaa.gov
AF: West Coast and Alaska Tsunami Warning Center, 910 South Felton Street, Palmer, AK 99645, United States
AU: Whitmore, P
EM: paul.whitmore.noaa.gov
AF: West Coast and Alaska Tsunami Warning Center, 910 South Felton Street, Palmer, AK 99645, United States
AU: Nyland, D
EM: david.nyland@noaa.gov
AF: West Coast and Alaska Tsunami Warning Center, 910 South Felton Street, Palmer, AK 99645, United States
AU: Medbery, A
EM: alec.medbery@noaa.gov
AF: West Coast and Alaska Tsunami Warning Center, 910 South Felton Street, Palmer, AK 99645, United States
AB: A necessary Tsunami Warning first step is fast and accurate earthquake location and magnitude. The West Coast and Alaska Tsunami Warning Center (WCATWC) has designed and implemented a seismic detection system that is capable of detecting sizeable earthquakes globally since its inauguration. This detection system has been enhanced and improved over the years of operation. Since the 2004 Sumatra Tsunami, WCATWC has taken particular steps to enhance its global seismic detection capability to lower the detection threshold and improve accuracy. These steps primarily include 24 hour staffing; enhanced seismic station coverage, improved wave energy detection, waveform spectral analysis and coherent phase association. In this talk, we summarize seismic detection capabilities improvements and the current status of WCATWC's detection methodology. We discuss the preliminary performance analysis results of our current seismic detection system.
DE: 0520 Data analysis: algorithms and implementation
DE: 3255 Spectral analysis (3205, 3280)
DE: 4564 Tsunamis and storm surges
DE: 7294 Seismic instruments and networks (0935, 3025)
DE: 7299 General or miscellaneous
SC: Seismology [S]
MN: 2007 Fall Meeting