EL's+Earthquake+2+on+Oct+2005

EL's Earthquake data 1 on Oct 08 2005 in Pakistan

EL's Earthquake data 3 on Oct 19 2005 near Japan media type="googlemap" key="http://maps.google.com/maps?f=q&geocode=&hl=en&q=13.4200+125.0770&safe=active&ie=UTF8&ll=30.600094,133.769531&spn=103.947405,127.617187&z=3&output=embed&s=AARTsJq8d4wApPDgDkCsqJFlBTq-PqPyCw" height="600" width="600"



According to the picture in powerpoint, the estimated arrival time of earthquake wave to Hanford Observatory center is approximately 11:17 AM for P-wave ( seismic x ) and 11:34 AM GMT for S-wave ( seismic y). Since the meaured time of earthquake detected in a local area is 11:08:25 GMT, I can imply that it takes about 9 minutes. 1. Distance from Hanford observatory center to the local earthquake near Indonesia : 6.701.55 miles 2. Time taken to travel : 9 minutes 3. 5km/sec -> the speed of P-wave, 3km/sec -> the speed of S-wave
 * **Given**

1. Convert miles into kilometer to match the unit with the speed of earthquake waves 6701.55 miles = 10785.99 km
 * **Procedure**

2. Divide the distance by the speed of P-wave to get how long does P-wave take to travel from Hanford Observatory center to local area. 10785.99 km / (5km/sec) = 1348.25 sec 1 minute = 60 seconds 1348.25 / 60 = 35 minutes

3. Divide the distance by the speed of S-wave to get how long does S-wave take to travel from Hanford Observatory center to local area. 10785.99 km / (3km/sec) = 3595.33 1 minute = 60 secs 3595.33 / 60 = 59 minutes 01 seconds

Since P-wave is detected in seismic x graph, I used the absolute maximum point on the x-graph. However, a difference between the estimated arrival time and the actual arrival time is too huge. So, what i can infer from this is, the earthquake happened in Indonesia is not detected at the absolute point but local maximum point at 11:50 AM, which makes sense. For S-wave, same process is applied that the local maximum at 12:00 can be considered as the earthquake from Indonesia.
 * **Conclustion**