Magnitude 5.7 Earthquake of Amukta Island, Alaska USA 2013 May 12

2013-05-12 20:06:46 UTC : Amukta Island, Alaska USA EARTHQUAKE

earthquake monitor,Alaska earthquake, earthquake realtime

Magnitude: 5.7

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-12 20:06:46 UTC

2013-05-12 09:06:46 UTC-11:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

52.508°N 171.941°W

Depth : Depth of starting Rupture 

45.0km (28.0mi)

Region : Amukta Island, Alaska

Directions and Distances :Directions and Distances from Geographical Reference in Close Proximity Which can be effected by Location Uncertainty

a) 46km (29mi) W of Amukta Island, Alaska

b) 1490km (926mi) SSE of Anadyr', Russia

c) 1644km (1022mi) WSW of Anchorage, Alaska

d) 1673km (1040mi) WSW of Knik-Fairview, Alaska

e) 2402km (1493mi) W of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	5.7 mb	± 0.03
Location	52.508°N, 171.941°W	± 19.6 km
Depth	45.0 km	± 12.1 km
Number of Phase Applied1	73
Minimum Distance2	158.1 km (1.42°)
Travel Time Residual3	1.14 sec
Azimuthal Gap4	106°

¹Number of phase Applied: 

In determining location of hypocenter, applied number of observations on P waves and S waves. The greater the more accurate prediction of EQ.

²Minimum Distance:

 Horizontal distance of nearest Station measured in Km from epicenter. The smaller the more accuracy in prediction of depth of EQ.

³Travel Time Residual:

 A way of measurement of fit of arrival time observed to arrival time predicted for particular location. The smaller the better fit of data.

⁴Azimuthal Gap: 

Expressed in degree; the smaller the smaller the error in horizontal positioning of EQ. Large uncertainty is considered when exceeds 180° (both depth and location)