Magnitude 3.1 Earthquake of Inyokern, California 2014-09-20

2014-09-20 00:33:21 UTC :Inyokern, California EARTHQUAKE

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Magnitude : 3.1

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-20 00:33:21 UTC
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1. 2014-09-19 17:33:21 UTC-07:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

1. 36.051°N 117.861°W

Depth : Depth of starting Rupture 

0.1km (0.1mi)

Region :Inyokern, California

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

a)  45km (28mi) N of Inyokern, California

b)  50km (31mi) NNW of Ridgecrest, California

c)  103km (64mi) N of California City, California

d) 104km (65mi) E of Porterville, California

e)  384km (239mi) SSE of Carson City, Nevada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.1 ml	± 0.20
Location	36.051°N, 117.861°W	± 0.3 km
Depth	0.1 km	± 0.6 km
Number of Phase Applied1	49
Minimum Distance2	5.5 km (0.05°)
Travel Time Residual3	0.2 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)