HR: 0800h
AN: T41A-1288    [Abstracts]
TI: Korean Peninsula Average Velocity and Q Models From Six Earthquake Events in the Yellow Sea and South Korea
AU: * Nguyen, B V
EM: bao@aftac.gov
AF: HQ AFTAC/TTR, 1030 S. Highway A1A, Patrick AFB, FL 32925-3002 United States
AB: The source parameters of these six events were presented by the author at previous AGU Meetings. Table 1: Source Parameters [Event Number][Date (dd/mm/yy)][USGS mb][Depth (km)][Slip (deg)][Dip (deg)][Strike (deg)][Seismic Moment (E+23 dyne-cm)] 1 03/11/92 4.8 07.0 015 65 110 0.758 2 22/01/92 5.1 02.0 070 40 345 4.720 3 23/07/02 4.7 09.0 140 65 010 1.900 4 22/03/03 4.8 13.0 165 75 025 1.750 5 30/03/03 4.7 06.0 050 70 035 0.550 6 29/05/04 5.3 11.0 065 55 160 3.790 The paths from these earthquake sources in the Yellow Sea and South Korea to the CDSN station MDJ cross the Korean Peninsula region. In this study, average Love-wave and Rayleigh-wave group-velocity dispersion data of these paths were used to invert for velocity model, and average anelastic attenuation coefficient data obtained using the technique of Tsai and Aki (1969) were used to invert for Q-beta-inverse (Qb-1). Table 2: Velocity and Qb-1 Models [Layer Number][Layer Thickness (km)][P (km/s)][S (km/s)][Density (g/cm3)][Model Std Dev (E-02)][Qb-1 (E-02)][Qb-1 Std Dev (E-03)][Qa/Qb] 1 2.00 4.37 2.52 2.37 7.08 0.8520 1.739 264/117 2 6.00 6.22 3.59 2.77 1.92 0.8199 0.337 274/122 3 10.0 6.11 3.53 2.73 0.75 0.6075 0.358 370/165 4 10.0 7.59 4.38 3.17 2.02 0.9566 0.802 235/105 5 10.0 6.63 3.83 2.88 2.71 1.2720 0.818 177/079 6 12.0 8.35 4.82 3.44 3.20 1.0270 1.926 219/097 7 0.00 8.28 4.65 3.41 2.57 0.4994 0.581 451/200
UR: http://home.cfl.rr.com/bao/AGU/
DE: 7205 Continental crust (1219)
DE: 7215 Earthquake source observations (1240)
DE: 7219 Seismic monitoring and test-ban treaty verification
DE: 7255 Surface waves and free oscillations
SC: Tectonophysics [T]
MN: Fall Meeting 2005