Magnitude 2.5 Earthquake of Spencer, Oklahoma 2014-08-19

2014-08-19 13:16:54 UTC :Spencer, Oklahoma EARTHQUAKE

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Magnitude: 2.5

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-08-19 13:16:54 UTC

1. 2014-08-19 08:16:54 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

35.592°N 97.378°W

Depth : Depth of starting Rupture 

5.7km (3.6mi)

Region : Spencer, Oklahoma

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

a)  7km (4mi) N of Spencer, Oklahoma

b)  11km (7mi) SE of Edmond, Oklahoma

c)  14km (9mi) NW of Choctaw, Oklahoma

d)  15km (9mi) N of Midwest City, Oklahoma

e)  18km (11mi) NE of Oklahoma City, Oklahoma

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.5 ml	--
Location	35.592°N, 97.378°W	--
Depth	5.7 km	± 2.1 km
Number of Phase Applied1	0
Minimum Distance2	--
Travel Time Residual3	0.61 sec
Azimuthal Gap4	45°

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)