Friday, August 2, 2013

Magnitude 2.5 Earthquake of Hidden Valley Lake, California USA 2013 August 02

2013-08-02 07:25:56 UTC : Hidden Valley Lake, California USA EARTHQUAKE

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Magnitude: 2.5


Event Time: Time and Date Starting of Earthquake Rupture 

  1. 2013-08-02 07:25:56 UTC

  1. 2013-08-02 00:25:56 UTC-07:00 at epicenter


Earthquake data:

Location : Position of Epicenter 

38.861°N 122.450°W

Depth : Depth of starting Rupture 

7.4km (4.6mi)

Region : Hidden Valley Lake, California
hidden valley lake, california earthquake 2013 august 02


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

a) 11km (7mi) ENE of Hidden Valley Lake, California

b) 18km (11mi) SE of Clearlake, California

c) 45km (28mi) NE of Healdsburg, California

d) 
47km (29mi) NE of Windsor, California

e) 88km (55mi) WNW of Sacramento, California

Location Uncertainty: 
Parameter
Value
Uncertainty
Magnitude
2.5 Md
± 0.10
Location
38.861°N, 122.450°W
± 0.3 km
Depth
7.4 km
± 0.5 km
Number of Phase Applied1
17

Minimum Distance2
2.0 km (0.02°)

Travel Time Residual3
0.1 sec

Azimuthal Gap4
122°

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)

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