CR+LIGO+post+assessment

Seismic Y: The earthquake happened at 3:50:40, but it doesn't show up on the LIGO data until 4:15 given that the earthquake is 10940.06 km away from LIGO Hanford and the fact that the waves took 24 minutes and 20 seconds to reach LIGO... so the distance divided by the seconds it travelled for would give us the speed in km/sec 10940.06/1460= 7.493 km/sec

Seismic Z: This is a second plot of the same earthquake so it occurred at 3:50:40 but this graph doesn't show any activity until just after 4, about 4:05 so 10940.06 divided by the time it took to reach LIGO 14:20 or 852 seconds 10940.06/852= 12.84 km/sec

Obviously these two graphs demonstrate a serious time lag in data reception by LIGO. I believe that this can be partially if not fully explained by the idea that these different filters, seismic x,y,z, are each more suited to detecting the 3 different types of waves emitted from earthquakes, primary, secondary, and love waves. The Primary waves travel fastest through most surfaces so they could explain the extremely fast speed of the waves in the seismic z graph. Secondary waves travel more slowly so it would explain the slower travel of the waves detected on seismic y.