Magnitude 4.1 Earthquake of Amatignak Island, Alaska 2014-07-13

2014-07-13 12:07:05 UTC : Amatignak Island, Alaska EARTHQUAKE

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Magnitude: 4.1

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-13 12:07:05 UTC

1. 2014-07-14 00:07:05 UTC+12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

50.310°N 178.781°E

Depth : Depth of starting Rupture 

34.9km (21.7mi)

Region : Amatignak Island, Alaska

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

a) 182km (113mi) SW of Amatignak Island, Alaska

b) 1420km (882mi) E of Petropavlovsk-Kamchatskiy, Russia

c) 1436km (892mi) E of Vilyuchinsk, Russia

d) 1439km (894mi) E of Yelizovo, Russia

e) 3060km (1901mi) W of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.1 mb	± 0.08
Location	50.310°N, 178.782°E	--
Depth	34.9 km	± 4.8 km
Number of Phase Applied1	64
Minimum Distance2	124.5 km (1.12°)
Travel Time Residual3	1.09 sec
Azimuthal Gap4	91°

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)