SGPOSTassesstment


 * 1)** Using Google Maps, I plugged in the longitude and latitude of the earthquake, -21.80; -175.15, and the coordinates for LIGO, 46°27'18.76"N, 119°24'27.51"W. Then I just used the line to measure on Google Maps the distance from LIGO to the earthquake: 10940 kilometers.


 * 2)** **You would calculate the speed of the wave using distance/time=speed.**

**Using the seismic x graph:**
I would use the distance, 10940 kilometers, and divide it by the time the earthquake hit which I've approximated to be. The actual time difference between the earthquake's starting time (04:26) and the LIGO time (04:45) is 19 minutes. Total seconds: 1140

10940km/1140 sec = 9.5965 km/sec

**Using the seismic z graph:**
I would use the distance, 10940 kilometers, and divide it by the time the earthquake hit which I've approximated to be. The actual time difference between the earthquake's starting time (4:26) and the LIGO time (4:38) is 12 minutes. Total seconds: 720 seconds

10940km/720 sec = 15.1944 km/sec