Magnitude 2.6 Earthquake of Truckee, California USA 2013 August 18

2013-08-18 00:50:29 UTC : Truckee, California USA EARTHQUAKE

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Magnitude: 2.6

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-08-18 00:50:29 UTC

1. 2013-08-17 17:50:29 UTC-07:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

39.226°N 120.486°W

Depth : Depth of starting Rupture 

0.7km (0.4mi)

Region : Truckee, California

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

a) 28km (17mi) WSW of Truckee, California

b) 49km (30mi) E of Grass Valley, California

c) 54km (34mi) NW of South Lake Tahoe, California

d) 61km (38mi) ENE of North Auburn, California

e) 62km (39mi) W of Carson City, Nevada

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.6 Md	± 0.20
Location	39.226°N, 120.486°W	± 0.3 km
Depth	0.7 km	± 3.0 km
Number of Phase Applied1	29
Minimum Distance2	29.0 km (0.26°)
Travel Time Residual3	0.09 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)