Wednesday, May 15, 2013

Magnitude 2.6 Earthquake of Harrah, Oklahoma USA 2013 May 15

2013-05-15 10:54:06 UTC : Harrah, Oklahoma USA EARTHQUAKE

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Magnitude: 2.6

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-15 10:54:06 UTC

2013-05-15 05:54:06 UTC-05:00 at epicenter


Earthquake data:

Location : Position of Epicenter 

35.549°N 97.160°W

Depth : Depth of starting Rupture 

4.3km (2.6mi)

Region : Harrah, Oklahoma

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

a) 6km (4mi) N of Harrah, Oklahoma

b) 11km (7mi) ENE of Choctaw, Oklahoma

c) 24km (15mi) ENE of Midwest City, Oklahoma

d) 
28km (17mi) ENE of Del City, Oklahoma

e) 33km (21mi) ENE of Oklahoma City, Oklahoma

Location Uncertainty: 
Parameter
Value
Uncertainty
Magnitude
2.6 mb_Lg
± 0.10
Location
35.549°N, 97.160°W
± 8.8 km
Depth
4.3 km
± 4.8 km
Number of Phase Applied1
27

Minimum Distance2
12.2 km (0.11°)

Travel Time Residual3
1.35 sec

Azimuthal Gap4
82°

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)

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