Sunday, April 19, 2015

Magnitude 2.9 Earthquake of Greenfield, California 2015-04-19

2015-04-19 17:20:12 (UTC) :North-East of Greenfield, California

earthquake monitor, California earthquake, earthquake realtime

Magnitude : 2.9

Event Time: Time and Date Starting of Earthquake Rupture 
  • 2015-04-19 17:20:12 (UTC)
Earthquake data:

Location : Position of Epicenter 

36.468°N 121.038°W

Depth : Depth of starting Rupture 

2.8 km

Region : Greenfield, California
Magnitude 2.9 Earthquake of Greenfield, California 2015-04-19

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

a) 24km (15mi) NE of Greenfield, California

b) 26km (16mi) E of Soledad, California

c) 29km (18mi) NNE of King City, California

d) 53km (33mi) SE of Hollister, California

e) 238km (148mi) S of Sacramento, California

Location Uncertainty: 
2.9 md
± 0.1
36.468°N 121.038°W
± 0.1 km
2.8 km
± 0.5
Number of Phase Applied1

Minimum Distance2
5.08 km (0.05°)

Travel Time Residual3
0.09 sec

Azimuthal Gap4

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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