Magnitude 3.4 Earthquake of Morrilton, Arkansas USA 2013 May 24

2013-05-24 05:44:24 UTC : Morrilton, Arkansas USA EARTHQUAKE

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Magnitude: 3.4

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-24 05:44:24 UTC

2013-05-24 00:44:24 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

35.298°N 92.715°W

Depth : Depth of starting Rupture 

5.7km (3.5mi)

Region : Morrilton, Arkansas

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

a) 16km (10mi) N of Morrilton, Arkansas

b) 33km (21mi) NW of Conway, Arkansas

c) 38km (24mi) E of Russellville, Arkansas

d) 55km (34mi) NNW of Maumelle, Arkansas

e) 72km (45mi) NNW of Little Rock, Arkansas

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.4 Mw	± 0.20
Location	35.298°N, 92.715°W	± 1.0 km
Depth	5.7 km	± 2.0 km
Number of Phase Applied1	22
Minimum Distance2	17.0 km (0.15°)
Travel Time Residual3	0.25 sec
Azimuthal Gap4	50°

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)