Magnitude 3.4 Earthquake of Crescent, Oklahoma 2015-04-04

2015-04-04 05:02:35 (UTC) :North of Crescent, Oklahoma

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Magnitude : 3.4

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-04 05:02:35 (UTC)

Earthquake data:

Location : Position of Epicenter 

36.126°N 97.571°W

Depth : Depth of starting Rupture 

4.6 km

Region : Mooreland, Oklahoma

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

a) 19km (12mi) N of Crescent, Oklahoma

b) 30km (19mi) NNW of Guthrie, Oklahoma

c) 40km (25mi) SE of Enid, Oklahoma

d) 46km (29mi) W of Stillwater, Oklahoma

e) 73km (45mi) N of Oklahoma City, Oklahoma

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.4 mb_lg	± 0.1
Location	36.126°N 97.571°W	± 1.4 km
Depth	4.6 km	± 7.5
Number of Phase Applied1	35
Minimum Distance2	38.07 km (0.34°)
Travel Time Residual3	0.36 sec
Azimuthal Gap4	103°

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)