Magnitude 3.0 Earthquake of Ferndale, California 2014-09-28

2014-09-28 13:53:10

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Magnitude : 3.0

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-28 13:53:10 UTC
2. 
   

1. 2014-09-28 05:53:10 UTC-08:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

40.613°N 125.086°W

Depth : Depth of starting Rupture 

0.1km (0.0mi)

Region : Ferndale, California

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

1. a) 69km (43mi) W of Ferndale, California

1. b) 78km (48mi) W of Fortuna, California

1. c) 80km (50mi) WSW of Eureka, California

1. d) 89km (55mi) WSW of Arcata, California

1. e) 382km (237mi) NW of Sacramento, California

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.0 md	± 0.12
Location	40.613°N, 125.086°W	± 5.9 km
Depth	0.1 km	± 15.2 km
Number of Phase Applied1	38
Minimum Distance2	75.3 km (0.68°)
Travel Time Residual3	0.56 sec
Azimuthal Gap4	252°

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)