Magnitude 4.7 Earthquake of Little Sitkin Island, Alaska 2014-07-11

2014-07-11 05:53:26 UTC : Little Sitkin Island, Alaska EARTHQUAKE

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Magnitude : 4.7

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-11 05:53:26 UTC
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3. 2014-07-10 20:53:26 UTC-09:00 at epicenter
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1. Earthquake data:

Location : Position of Epicenter 

51.785°N 178.477°E

Depth : Depth of starting Rupture 

94.3km (58.6mi)

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) 18km (11mi) S of Little Sitkin Island, Alaska

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b)   1352km (840mi) E of Petropavlovsk-Kamchatskiy, Russia

c)  1369km (851mi) E of Yelizovo, Russia

d)  1369km (851mi) E of Vilyuchinsk, Russia

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e)  2973km (1847mi) W of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.7 mb	± 0.04
Location	51.785°N, 178.477°E	--
Depth	94.3 km	± 5.6 km
Number of Phase Applied1	65
Minimum Distance2	73.0 km (0.66°)
Travel Time Residual3	0.93 sec
Azimuthal Gap4	42°

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)