Kurile Islands - 15 November 2006, 11:14:17 UTC (Mw = 8.3) The animation shows the signal power in the 100-15s period range observed across the western United States by the EarthScope transportable array and generated by the 15 November 2006 Kurile Islands great earthquake. Each circle represents a seismometer and the colors change to reflect variations in the signal power crossing the array. For more information on the earthquake, click here. A plot of the displacement seismograms used in the animation is shown near the bottom of this page. For the animation, I use velocity seismograms corrected for instrument sensitivity only - this enhances the shorter period components of the signal.
Selected seismic wave traveltimes (from Phillip Crotwell's version of taup) Gcarc = 54deg / Depth = 15 km Phase Time Slowness P 563.32 7.307 PcP 628.20 3.817 PP 684.75 8.998 PP 692.67 9.954 PP 692.88 9.766 S 1019.45 13.526 ScS 1152.16 7.086 SS 1242.26 15.759 SS 1264.45 17.822 SS 1264.45 17.799 ![]() Vertical component displacement seismograms used in the animation. The animation illustrates the signal power (which is proportional to the square of the ground velocity). The two red lines show iasp91 P and PP times, and the two blue lines show the predicted arrival times of S and SS. Open image in separate window to enlarge. |