Magnitude 2.8 Earthquake of Duvall, Washington 2014-07-25

2014-07-25 10:01:05 UTC : Duvall, Washington EARTHQUAKE

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Magnitude: 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-25 10:01:05 UTC
2. 
   

1. 2014-07-25 03:01:05 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

47.737°N 122.001°W

Depth : Depth of starting Rupture 

1.4km (0.9mi)

Region : Duvall, Washington

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

a) 1km (1mi) WSW of Duvall, Washington

b) 5km (3mi) E of Cottage Lake, Washington

c) 6km (4mi) NNE of Union Hill-Novelty Hill, Washington

d) 11km (7mi) NE of Redmond, Washington

e) 103km (64mi) NE of Olympia, Washington

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 Ml	± 0.10
Location	47.737°N, 122.001°W	± 0.5 km
Depth	1.4 km	± 1.0 km
Number of Phase Applied1	37
Minimum Distance2	3.0 km (0.03°)
Travel Time Residual3	0.39 sec
Azimuthal Gap4	50°

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)