Magnitude 2.6 Earthquake of Ellensburg, Washington 2014-07-19

2014-07-19 06:13:16 UTC : Ellensburg, Washington EARTHQUAKE

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Magnitude: 2.6

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-19 06:13:16 UTC

1. 2014-07-18 23:13:16 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

46.828°N 120.573°W

Depth : Depth of starting Rupture 

12.5km (7.8mi)

Region : Ellensburg, Washington

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

a)  18km (11mi) S of Ellensburg, Washington

b)  25km (16mi) NNW of Yakima, Washington

c)  26km (16mi) N of West Valley, Washington

d)  68km (42mi) SSW of East Wenatchee, Washington

e)  178km (111mi) E of Olympia, Washington

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.6 Md	± 0.40
Location	46.828°N, 120.573°W	± 0.3 km
Depth	12.5 km	± 0.7 km
Number of Phase Applied1	35
Minimum Distance2	9.0 km (0.08°)
Travel Time Residual3	0.17 sec
Azimuthal Gap4	47°

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)