Magnitude 4.3 Earthquake of Little Sitkin Island, Alaska 2014-08-22

2014-08-22 23:24:26 UTC  : Little Sitkin Island, Alaska EARTHQUAKE

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Magnitude: 4.3

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-08-22 23:24:26 UTC

1. 2014-08-22 14:24:26 UTC-09:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

1. 51.581°N 178.262°E

Depth : Depth of starting Rupture 

73.7km (45.8mi)

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) 44km (27mi) SSW of Little Sitkin Island, Alaska

 b)   1343km (835mi) E of Petropavlovsk-Kamchatskiy, Russia

 c)  1360km (845mi) E of Yelizovo, Russia

1. 
   

 d)  1360km (845mi) E of Vilyuchinsk, Russia

1.  e) 2999km (1863mi) W of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.3 mb	± 0.06
Location	51.581°N, 178.262°E	--
Depth	73.7 km	± 7.5 km
Number of Phase Applied1	92
Minimum Distance2	75.7 km (0.68°)
Travel Time Residual3	0.81 sec
Azimuthal Gap4	134°

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)