Magnitude 3.5 Earthquake of Covelo, California 2014-09-14

2014-09-14 20:17:46 UTC :Covelo, California EARTHQUAKE

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Magnitude: 3.5

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-14 20:17:46 UTC
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1. 2014-09-14 13:17:46 UTC-07:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

1. 39.757°N 123.134°W

Depth : Depth of starting Rupture 

6.5km (4.0mi)

Region : Covelo, California

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

a)  10km (6mi) ESE of Covelo, California

b)  67km (42mi) N of Ukiah, California

c)  89km (55mi) WSW of Red Bluff, California

d) 98km (61mi) NNW of Clearlake, California

e)  192km (119mi) NW of Sacramento, California

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.5 Ml	± 0.20
Location	39.757°N, 123.134°W	± 0.3 km
Depth	6.5 km	± 0.5 km
Number of Phase Applied1	61
Minimum Distance2	16.0 km (0.14°)
Travel Time Residual3	0.27 sec
Azimuthal Gap4	22°

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)