Saturday, September 6, 2014

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


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





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)

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