Magnitude 3.0 Earthquake of Cohoe, Alaska 2014-09-25

2014-09-25 02:03:00 UTC  : Cohoe, Alaska EARTHQUAKE

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Magnitude : 3.0

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-25 02:03:00 UTC

1. 2014-09-24 18:03:00 UTC-08:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

1. 60.140°N 151.315°W

Depth : Depth of starting Rupture 

23.1km (14.4mi)

Region : Cohoe, Alaska

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

 a)  25km (16mi) S of Cohoe, Alaska

  b)   142km (88mi) SSW of Anchorage, Alaska

 c)  179km (111mi) SSW of Knik-Fairview, Alaska

1. 
   

 d)  554km (344mi) SSW of Badger, Alaska

1.  e)  895km (556mi) W of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.0 ml	--
Location	60.140°N, 151.315°W	± 0.4 km
Depth	23.1 km	± 0.5 km
Number of Phase Applied1	54
Minimum Distance2	--
Travel Time Residual3	0.74 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)