Magnitude 3.5 Earthquake of Medford, Oklahoma 2014-09-08

2014-09-08 21:02:14 UTC :Medford, Oklahoma EARTHQUAKE

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Magnitude : 3.5

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-08 21:02:14 UTC

1. 2014-09-08 16:02:14 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

36.854°N 97.887°W

Depth : Depth of starting Rupture 

6.2km (3.8mi)

Region : Medford, Oklahoma

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

a)  14km (9mi) WNW of Medford, Oklahoma

b)  50km (31mi) N of Enid, Oklahoma

c)  73km (45mi) WNW of Ponca City, Oklahoma

d)  79km (49mi) WSW of Arkansas City, Kansas

e)  157km (98mi) NNW of Oklahoma City, Oklahoma

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.5 ml	--
Location	36.854°N, 97.887°W	--
Depth	6.2 km	± 7.0 km
Number of Phase Applied1	0
Minimum Distance2	--
Travel Time Residual3	0.96 sec
Azimuthal Gap4	86°

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)