CC+Quake+04+12

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This quake occurred on 2005/04/12 at 02:40:26 GMT. The coordinates were 14.0780N 91.1630W. The magnitude of the earthquake was 5.40. I inserted these coordinates into Google Earth and used the ruler tool to find the distance from the coordinates of the earthquake to the LIGO coordinates that we agreed on. The distance was 4,452.93 km. media type="googlemap" key="http://maps.google.com/maps/ms?hl=en&gl=us&ie=UTF8&oe=UTF8&msa=0&msid=116174442152556522216.00044aed47b5bfed7b7b0&s=AARTsJp_2GkW3hnXksuxSKEgoO5Z0NpcWQ&ll=34.307144,-89.648437&spn=67.222382,112.5&z=3&iwloc=00044aed70a4d0d8a450a&output=embed" height="480" width="640"

To find the amount of time it took the earthquake to reach LIGO for p-waves: distance = 4,452.93 km speed = 5 - 8 km/s

time = distance / speed

t = 4,452.93 / 5 or t = 4,452.93 / 8 t = 890.586s or t = 556.61625 s t = 14.8 mins or t = 9.3 mins

So the time it takes for the p-waves to reach LIGO should be from 9.3mins - 14.8 mins after the earthquake has started. The time the earthquake should arrive at LIGO should be around 02:50 GMT or a few mins later. The graph shows a spike around this same time as well. I conclude this is the same earthquake that LIGOpicked up.