Wednesday, August 20, 2014

Magnitude 2.9 Earthquake of Ridgemark, California 2014-08-20

2014-08-20 08:34:19 UTC :Ridgemark, California EARTHQUAKE

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Magnitude: 2.9


Event Time: Time and Date Starting of Earthquake Rupture 


  1. 2014-08-20 08:34:19 UTC

  1. 2014-08-20 01:34:19 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 


  1. 36.780°N 121.390°W

Depth : Depth of starting Rupture 

2.9km (1.8mi)


Region : Ridgemark, California



Magnitude 2.9 Earthquake of Ridgemark, California 2014-08-20




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

a)  4km (2mi) SSW of Ridgemark, California

b)  8km (5mi) S of Hollister, California



c)  24km (15mi) E of Prunedale, California

d)  
26km (16mi) ENE of Salinas, California

e)  200km (124mi) S of Sacramento, California


Location Uncertainty: 
Parameter
Value
Uncertainty
Magnitude
2.9 Ml
± 0.40
Location
36.780°N, 121.390°W
± 0.1 km
Depth
2.9 km
± 0.4 km
Number of Phase Applied1
54

Minimum Distance2
4.0 km (0.04°)

Travel Time Residual3
0.09 sec

Azimuthal Gap4
25°

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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