Magnitude 2.8 Earthquake of Yosemite Valley, California 2014-08-12

2014-08-12 01:31:39 UTC :Yosemite Valley, California EARTHQUAKE

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Magnitude: 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-08-12 01:31:39 UTC
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1. 2014-08-11 18:31:39 UTC-07:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

1. 37.481°N 119.368°W

Depth : Depth of starting Rupture 

19.2km (11.9mi)

Region : Yosemite Valley, California

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

a)  17km (11mi) S of Yosemite Valley, California

b)  80km (50mi) NE of Chowchilla, California

c)  82km (51mi) NNE of Madera, California

d)  85km (53mi) N of Clovis, California

e)  176km (109mi) S of Carson City, Nevada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 Md	± 0.20
Location	37.481°N, 119.368°W	± 0.4 km
Depth	19.2 km	± 1.3 km
Number of Phase Applied1	26
Minimum Distance2	30.0 km (0.27°)
Travel Time Residual3	0.12 sec
Azimuthal Gap4	68°

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)