Magnitude 2.8 Earthquake of East Quincy, California 2014-09-04

2014-09-04 00:40:53 UTC :East Quincy, California EARTHQUAKE

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Magnitude: 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-04 00:40:53 UTC
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1. 2014-09-03 17:40:53 UTC-07:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

1. 39.816°N 120.707°W

Depth : Depth of starting Rupture 

0.1km (0.1mi)

Region :East Quincy, California

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

a)  19km (12mi) SE of East Quincy, California

b)  64km (40mi) S of Susanville, California

c)  72km (45mi) NW of Truckee, California

d)  74km (46mi) NNE of Grass Valley, California

e)  110km (68mi) NW of Carson City, Nevada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 Md	± 0.20
Location	39.816°N, 120.707°W	± 0.5 km
Depth	0.1 km	± 4.7 km
Number of Phase Applied1	20
Minimum Distance2	7.0 km (0.06°)
Travel Time Residual3	0.27 sec
Azimuthal Gap4	58°

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)