Magnitude 2.9 Earthquake of Irving, Texas 2014-09-11

2014-09-11 08:21:59 UTC : Irving, Texas EARTHQUAKE

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Magnitude : 2.9

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-11 08:21:59 UTC

1. 2014-09-11 03:21:59 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

32.847°N 96.952°W

Depth : Depth of starting Rupture 

5.0km (3.1mi)

Region : Irving, Texas

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

a)  3km (2mi) N of Irving, Texas

b)  10km (6mi) SSW of Farmers Branch, Texas

c)  12km (7mi) NNE of Grand Prairie, Texas

d)  12km (7mi) E of Euless, Texas

e)  295km (183mi) S of Oklahoma City, Oklahoma

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.9 mb_lg	± 0.08
Location	32.848°N, 96.952°W	--
Depth	5.0 km	± 2.0 km
Number of Phase Applied1	48
Minimum Distance2	58.1 km (0.52°)
Travel Time Residual3	1.17 sec
Azimuthal Gap4	64°

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)