DWJ+Post+Assessment+LIGO

1. Use Google Maps (or Google Earth—your pick) to calculate the distance from the quake’s epicenter to LIGO.
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I have picked Ency Lee's earthquake 1. 2005/10/08 03:50:40.80 34.5390 73.5880 26.00 7.60 Mw 724 0.90 NEI 200510084006







Distance from Hanford observatory center to the local earthquake in Pakistan using the google map : **10,459.46** km

Distance/Time = Speed You can calculate the speed of the wave using distance/time=speed.

Using... 1. __The Seismic Y Graph:__ You should use the distance 10,459.46km divided by the time. I have nearly the time the earthquake started for the Y Graph to be about 4:12. The difference in time of the actual starting of the earthquake, 3:50:40.80, and the LIGO time, 4:12, is 21 minutes and 20 seconds. The total seconds would be 1,280 seconds.

(10,459.46km) / (1,280sec) = 8.17145km/sec

2. __The Seismic Z Graph:__ You should use the distance 10,459.46km divided by the time. I have nearly the time the earthquake started for the Z Graph to be about 4:08. The difference in time of the actual starting of the earthquake, 3:50:40.80, and the LIGO time, 4:08, is 17 minutes and 20 seconds. The total seconds would be 1040 seconds.

(10,459.46km) / (1040sec) = 10.05717km/sec

==The reason the waves traveled in different directions is because there are four different types of waves. First of all, there are two types of wave. P-Waves are waves taht can travel through gasses, elastic solids and liquids (water), including the Earth, and S-Waves are traveling through the surface(land). S-waves, like waves in a rope, as opposed to waves moving through a slinky, the P-wave **. The wave moves through elastic mediums, and the main restoring force comes from shear effects. These waves are divergence less and obey the continuity equation for incompressible media.** Since there are two seismic waves have different characters, the speed of the earthquake waves must have difference. == == ==



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==The reason that the times for these two graphs are different is because the seismometer, tilt meter, and magnetometer have three different sensors. They have their own independent directions. Here is a link to see the earthquake with different graphs. This page has a LIGO draft from MIT and CIT> [|LIGO] ==