Magnitude 2.7 Earthquake of Medford, Oklahoma 2014-09-07

2014-09-07 16:31:49 UTC :Medford, Oklahoma EARTHQUAKE

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Magnitude: 2.7

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-07 16:31:49 UTC

1. 2014-09-07 11:31:49 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

36.614°N 97.705°W

Depth : Depth of starting Rupture 

4.7km (2.9mi)

Region : Medford, Oklahoma

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

a)  21km (13mi) S of Medford, Oklahoma

b)  28km (17mi) NNE of Enid, Oklahoma

c)  56km (35mi) W of Ponca City, Oklahoma

d)  77km (48mi) SW of Arkansas City, Kansas

e)  128km (80mi) N of Oklahoma City, Oklahoma

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.7 mb_lg	± 0.08
Location	36.614°N, 97.705°W	--
Depth	4.7 km	± 7.7 km
Number of Phase Applied1	30
Minimum Distance2	27.7 km (0.25°)
Travel Time Residual3	0.33 sec
Azimuthal Gap4	71°

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)