Magnitude 2.8 Earthquake of Birch Bay, Washington 2014-10-24

2014-10-24 10:02:49 UTC :Birch Bay, Washington EARTHQUAKE

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Magnitude: 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-10-24 10:02:49 UTC
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1. 2014-10-24 03:02:49 UTC-07:00 at epicenter
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Earthquake data:

Location : Position of Epicenter 

48.827°N 122.820°W

Depth : Depth of starting Rupture 

21.0km (13.0mi)

Region : Birch Bay, Washington

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

a)  11km (7mi) SSW of Birch Bay, Washington

b)  16km (10mi) W of Ferndale, Washington

c)  21km (13mi) S of White Rock, Canada

d)  25km (16mi) WNW of Bellingham, Washington

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e)  59km (37mi) NE of Victoria, Canada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 Ml	± 0.30
Location	48.827°N, 122.820°W	± 0.4 km
Depth	21.0 km	± 0.6 km
Number of Phase Applied1	31
Minimum Distance2	15.0 km (0.13°)
Travel Time Residual3	0.17 sec
Azimuthal Gap4	130°

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)