Magnitude 2.9 Earthquake of South of Caldwell, Kansas 2015-04-04

2015-04-04 01:23:28 (UTC) :South of Caldwell, Kansas

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Magnitude : 2.9

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-04 01:23:28 (UTC)

Earthquake data:

Location : Position of Epicenter 

36.906°N 97.626°W

Depth : Depth of starting Rupture 

5.0 km

Region : Caldwell, Kansas

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

a) 14km (9mi) S of Caldwell, Kansas

b) 53km (33mi) WNW of Ponca City, Oklahoma

c) 55km (34mi) WSW of Arkansas City, Kansas

d) 60km (37mi) NNE of Enid, Oklahoma

e) 159km (99mi) N of Oklahoma City, Oklahoma

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.9 mb_lg	± 0.1
Location	36.906°N 97.626°W	± 1.4 km
Depth	5.0 km	± 2.0
Number of Phase Applied1	38
Minimum Distance2	17.81 km (0.16°)
Travel Time Residual3	0.41 sec
Azimuthal Gap4	28°

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)