Magnitude 2.8 Earthquake of Anchor Point, Alaska 2014-09-17

2014-09-17 21:36:57 UTC  : Anchor Point, Alaska EARTHQUAKE

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Magnitude : 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-17 21:36:57 UTC

1. 2014-09-17 13:36:57 UTC-08:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

1. 59.767°N 153.019°W

Depth : Depth of starting Rupture 

87.5km (54.4mi)

Region : Anchor Point, Alaska

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

 a)  66km (41mi) W of Anchor Point, Alaska

 b)    235km (146mi) SW of Anchorage, Alaska

 c)  269km (167mi) SW of Knik-Fairview, Alaska

1. 
   

 d)  627km (390mi) SSW of College, Alaska

1.  e)  997km (620mi) W of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 ml	--
Location	59.767°N, 153.019°W	± 0.5 km
Depth	87.5 km	± 0.6 km
Number of Phase Applied1	42
Minimum Distance2	--
Travel Time Residual3	0.7 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)