Magnitude 3.1 Earthquake of Pine Valley, California 2014-07-20

2014-07-20 09:18:21 UTC :Pine Valley, California EARTHQUAKE

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Magnitude: 3.1

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-20 09:18:21 UTC

1. 2014-07-20 02:18:21 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

32.898°N 116.285°W

Depth : Depth of starting Rupture 

4.5km (2.8mi)

Region : Pine Valley, California

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

a)  24km (15mi) ENE of Pine Valley, California

b)  45km (28mi) E of Alpine, California

c)  48km (30mi) ESE of San Diego Country Estates, California

d)  49km (30mi) NE of Tecate, Mexico

e)  397km (247mi) W of Phoenix, Arizona

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.1 ml	± 0.22
Location	32.898°N, 116.285°W	± 0.2 km
Depth	4.5 km	± 0.8 km
Number of Phase Applied1	119
Minimum Distance2	3.6 km (0.03°)
Travel Time Residual3	0.29 sec
Azimuthal Gap4	47°

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)