Magnitude 2.8 Earthquake of Greenbrier, Arkansas USA 2013 June 13

2013-06-13 06:18:04 UTC : Greenbrier, Arkansas USA EARTHQUAKE

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Magnitude: 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2013-06-13 06:18:04 UTC

1. 2013-06-13 01:18:04 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

35.411°N 92.405°W

Depth : Depth of starting Rupture 

0.1km (0.1mi)

Region : Greenbrier, Arkansas

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

a) 18km (11mi) NNW of Greenbrier, Arkansas

b) 34km (21mi) N of Conway, Arkansas

c) 58km (36mi) N of Maumelle, Arkansas

d) 60km (37mi) NW of Cabot, Arkansas

e) 73km (45mi) N of Little Rock, Arkansas

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 MbLg	± 0.20
Location	35.411°N, 92.405°W	± 0.8 km
Depth	0.1 km	± 2.6 km
Number of Phase Applied1	19
Minimum Distance2	15.0 km (0.13°)
Travel Time Residual3	0.28 sec
Azimuthal Gap4	83°

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)