AL's+LIGO+Sensitivity+Project+Assessment


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 * =Date= || =Time= || =Lat= || =Lon= || =Depth= || =Mag= ||
 * 2005/10/08 || 03:50:40.80 || 34.5390 || 73.5880 || 26.00 || 7.60 ||

1.) Google Map

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2.)

Distance from earthquake site over the Pacific to LIGO in Hanford is **__//10,904.53 km//__**.

Distance from earthquake site over Central Asia, Europe and Atlantic is __//**15,006.45 km**//__. So it is a longer distance

__**Y Seismic Graph**__: From the graph, we can see where the detection begins at 4:15 while the earthquake happened at 3:50:40:80. The speed for the //**distance over the Pacific would be 7.27 km/sec**//, because 10,904.53/1500 sec (time between earthquake happening and detection) = 7.27. //**The speed over Eurasia and Atlantic would be 15,006.45 km/1500 sec = 10.0043 km/sec**//.


 * __Z Seismic Graph__**: In this graph, the earthquake is detected around 4:05 given from the same earthquake at 3:50:40:80. We see there is a 15 minute difference between the detection and the happening for the z-seismic graph. //**The speed of the quake over the Pacific would be 10,904.53/900 sec = 12.12 km/sec. The speed over Eurasia and the Atlantic would be 15,006.45 km/900 sec = 16.67 km/sec for the earthquake detection to happen over this route.**//

3.) My hypothesis is that the difference in speeds between the route over the Pacifc (shorter distance) and over Eurasia and the Atlantic (longer distance) would account for the difference in detection time. The difference between the distances to LIGO from the earthquake site is (15006.45-10904.53) 4,101.92 km. Just to use as an example, I will use the speeds of the distance over the Pacific for the y and z seismic graphs which would be 7.27 km/sec and 12.12 km/sec respectively.(This is for p-waves) To find the distance in seconds, I take 4,101.92 km/7.27 km = 9.4 minutes to travel that difference in time for over the Pacific in the y graph. For over Eurasia and Atlantic graph, you take 4,101.92 km/10.0043 km and you get around 6.8 minutes. Both times are around the same difference in time between the earthquake detections of the z and y graph according to bluestone. Considering this isn't an exact measurement so a difference of only 3 to 4 minutes isn't a huge leap.