Sunday, October 19, 2014

Magnitude 4.2 Earthquake of Little Sitkin Island, Alaska 2014-10-19

2014-10-19 11:56:14 UTC  : Little Sitkin Island, Alaska EARTHQUAKE

earthquake monitor,Alaska earthquake, earthquake realtime

Magnitude : 4.2

Event Time: Time and Date Starting of Earthquake Rupture 

  1. 2014-10-19 11:56:14 UTC

  1. 2014-10-19 02:56:14 UTC-09:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

  1. 51.771°N 178.469°E

Depth : Depth of starting Rupture 

114.2km (71.0mi)

Region : Little Sitkin Island, Alaska

Magnitude 4.2 Earthquake of Little Sitkin Island, Alaska 2014-10-19

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

 a)   19km (12mi) S of Little Sitkin Island, Alaska

 b)   1351km (839mi) E of Petropavlovsk-Kamchatskiy, Russia

 c)  1368km (850mi) E of Vilyuchinsk, Russia

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

  1.  e)  2975km (1849mi) W of Whitehorse, Canada

Location Uncertainty: 
4.2 mb
± 0.06
51.771°N, 178.469°E
± 1.3 km
114.2 km
± 11.7 km
Number of Phase Applied1

Minimum Distance2
72.5 km (0.65°)

Travel Time Residual3
0.75 sec

Azimuthal Gap4

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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