Magnitude 4.5 Earthquake of Ferndale, California USA 2013 November 04

2013-11-04 05:57:15 UTC: Ferndale, California USA EARTHQUAKE

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Magnitude: 4.5

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-11-04 05:57:15 UTC

1. 2013-11-03 21:57:15 UTC-08:00 at epicenter
2. 
   

Earthquake data:

Location : Position of Epicenter 

41.133°N 127.321°W

Depth : Depth of starting Rupture 

10.0km (6.2mi)

Region : Ferndale, California

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

a) 265km (165mi) WNW of Ferndale, California

b) 268km (167mi) W of Eureka, California

c) 271km (168mi) W of McKinleyville, California

d) 273km (170mi) WNW of Fortuna, California

e) 548km (341mi) SW of Salem, Oregon

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.5 mb	± 0.08
Location	41.133°N, 127.321°W	--
Depth	10.0 km	± 2.0 km
Number of Phase Applied1	28
Minimum Distance2	279.5 km (2.51°)
Travel Time Residual3	1.19 sec
Azimuthal Gap4	249°

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)