Magnitude 2.8 Earthquake of Malden, Missouri 2014-07-04

2014-07-04 13:41:47 UTC : Malden, Missouri EARTHQUAKE

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Magnitude : 2.8

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-04 13:41:47 UTC
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1. 2014-07-04 08:41:47 UTC-05:00 at epicenter

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Earthquake data:

Location : Position of Epicenter 

36.556°N 90.017°W

Depth : Depth of starting Rupture 

7.7km (4.8mi)

Region : Malden, Missouri

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

a) 4km (2mi) W of Malden, Missouri

b) 35km (22mi) N of Kennett, Missouri

c) 40km (25mi) ESE of Poplar Bluff, Missouri

d) 52km (32mi) SW of Sikeston, Missouri

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e) 287km (178mi) NE of Little Rock, Arkansas

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.8 md	± 0.20
Location	36.556°N, 90.017°W	± 0.3 km
Depth	7.7 km	± 0.9 km
Number of Phase Applied1	58
Minimum Distance2	7.0 km (0.06°)
Travel Time Residual3	0.12 sec
Azimuthal Gap4	65°

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)