Magnitude 2.9 Earthquake of Trinidad, Colorado USA 2013 September 20

2013-09-20 02:14:59 UTC : Trinidad, Colorado USA EARTHQUAKE

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Magnitude: 2.9

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-09-20 02:14:59 UTC

1. 2013-09-19 20:14:59 UTC-06:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

37.029°N 104.839°W

Depth : Depth of starting Rupture 

4.2km (2.6mi)

Region : La Verne, California

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

a) 33km (21mi) WSW of Trinidad, Colorado

b) 137km (85mi) S of Pueblo, Colorado

c) 146km (91mi) S of Pueblo West, Colorado

d) 160km (99mi) SSE of Canon City, Colorado

e) 178km (111mi) NNE of Santa Fe, New Mexico

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.9 ml	± 0.07
Location	37.029°N, 104.839°W	--
Depth	4.2 km	± 2.5 km
Number of Phase Applied1	29
Minimum Distance2	40.0 km (0.36°)
Travel Time Residual3	0.91 sec
Azimuthal Gap4	48°

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)