Magnitude 4.6 Earthquake of Little Sitkin Island, Alaska 2014-09-06

2014-09-06 11:59:27 UTC  : Little Sitkin Island, Alaska EARTHQUAKE

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Magnitude: 4.6

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-06 11:59:27 UTC

1. 2014-09-06 02:59:27 UTC-09:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

1. 51.973°N 178.401°E

Depth : Depth of starting Rupture 

120.6km (74.9mi)

Region : Little Sitkin Island, Alaska

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

 a)    7km (4mi) WNW of Little Sitkin Island, Alaska

 b)     1342km (834mi) E of Petropavlovsk-Kamchatskiy, Russia

 c)   1359km (844mi) E of Yelizovo, Russia

 d)   1359km (844mi) E of Vilyuchinsk, Russia

1.  e)   2965km (1842mi) W of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.6 mb	± 0.04
Location	51.973°N, 178.401°E	--
Depth	120.6 km	± 7.8 km
Number of Phase Applied1	116
Minimum Distance2	91.1 km (0.82°)
Travel Time Residual3	0.73 sec
Azimuthal Gap4	85°

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)