Magnitude 2.7 Earthquake of Union City, California 2014-09-06

2014-09-06 07:19:14 UTC :Union City, California EARTHQUAKE

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Magnitude : 2.7

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-06 07:19:14 UTC
2. 
   

1. 2014-09-06 00:19:14 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

37.588°N 121.984°W

Depth : Depth of starting Rupture 

6.5km (4.0mi)

Region : Union City, California

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

a) 3km (2mi) ESE of Union City, California

b) 4km (2mi) N of Fremont, California

c) 8km (5mi) NE of Newark, California

d) 11km (7mi) SSE of Fairview, California

e) 118km (73mi) SSW of Sacramento, California

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.7 Md	± 0.10
Location	37.588°N, 121.985°W	± 0.2 km
Depth	6.5 km	± 0.7 km
Number of Phase Applied1	67
Minimum Distance2	3.0 km (0.03°)
Travel Time Residual3	0.16 sec
Azimuthal Gap4	29°

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)