AP's+Earthquake+3

AP's Earthquakes Tabular Data

First I entered my first day into the Bluestone analysis tool, Jan 8th, 2005. I noticed the large spike at about 16:00:00 GMT time. I then looked at my second week of data from LIGO and found that all of the earthquake readings in the evening and most of the day are in the 4.0 to 4.9 range. At 16:08 GMT an earthquake with a magnitude of 5.1 occurs which I believe is the one depicted on the graph.



I put the longitude and latitude coordinates in Google Earth and found the location of the proposed earthquake. I found the distance between the origin of the earthquake and Hanford. I took the distance in km and divided it by how long it takes a P wave to travel in one sec which is 5-8 km/sec. Doing this I found out that it took about 20 minutes to reach Hanford.

8,222.78 km / 7 km/sec = 1,174.68 km/sec 1,174.68 sec / 60 sec = 19.58 min.

Looking at the LIGO data, the spike occurs 16:25:00 GMT. It took about 20 minutes to reach Hanford so it should have reached Hanford at about 16:25:00 as the data shows.

With the math and data matching up I believe that the earthquake depicted on LIGO is the same one from NCEDC