Magnitude 6.2 Earthquake of Willow, Alaska 2014-09-25

2014-09-25 17:51:17 UTC  : Willow, Alaska EARTHQUAKE

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Magnitude : 6.2

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-25 17:51:17 UTC

1. 2014-09-25 09:51:17 UTC-08:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

1. 61.965°N 151.794°W

Depth : Depth of starting Rupture 

101.7km (63.2mi)

Region : Willow, Alaska

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

 a)  95km (59mi) WNW of Willow, Alaska

  b)   126km (78mi) WNW of Knik-Fairview, Alaska

 c)  130km (81mi) NW of Anchorage, Alaska

1. 
   

 d)  378km (235mi) SSW of College, Alaska

1.  e)  904km (562mi) WNW of Whitehorse, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	6.2 mwb	± 0.06
Location	61.966°N, 151.794°W	--
Depth	101.7 km	± 5.0 km
Number of Phase Applied1	200
Minimum Distance2	13.8 km (0.12°)
Travel Time Residual3	1.22 sec
Azimuthal Gap4	21°

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)