Penn State - Earthquake Seismology

Earthquake Ground Motion Animations

Near Hawaii - 15 October 2006, 17:07:48 UTC (Mw = 6.7)

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 October 2006 Hawaii 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.


Click here for more information on EarthScope; click here for information on the status of the transportable array.

Selected seismic wave traveltimes (from Phillip Crotwell's version of taup), distance 


Gcarc = 34deg / Depth = 20 km
Phase Time      Slowness
P	  393.56	   8.716
PP	  463.00	  12.699
PP	  464.87	  13.597
PP	  464.98	  13.543
PP	  468.30	  11.084
PP	  469.06	  11.366
PPP	  473.36	  13.688
PcP	  556.88	   2.789
S	  711.78	  15.500
SS	  831.42	  24.230
SSS	  846.91	  24.516
SS	  854.89	  20.469
SS	  855.95	  20.947
ScS	 1020.17	   5.155


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.

Penn State Earthquake Seismology
Department of Geosciences