Friday, April 3, 2015

Magnitude 4.4 Earthquake of Old Iliamna, Alaska 2015-04-02

2015-04-02 13:15:05 (UTC) :SE of Old Iliamna, Alaska

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Magnitude : 4.4

Event Time: Time and Date Starting of Earthquake Rupture 
  • 2015-04-02 13:15:05 (UTC)
Earthquake data:

Location : Position of Epicenter 

59.414°N 153.892°W

Depth : Depth of starting Rupture 

114.6 km

Region : Old Iliamna, Alaska
Magnitude 4.4 Earthquake of Old Iliamna, Alaska 2015-04-02

Location Uncertainty: 
4.4 ml
59.414°N 153.892°W
± 0.3 km
114.6 km
± 0.4
Number of Phase Applied1

Minimum Distance2

Travel Time Residual3
0.89 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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