Magnitude 4.4 Earthquake of Hidalgotitlan, Mexico 2015-04-06

2015-04-06 00:59:21 (UTC) :South-SouthEast of Hidalgotitlan, Mexico

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Magnitude : 4.4

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-06 00:59:21 (UTC)

Earthquake data:

Location : Position of Epicenter 

17.523°N 94.497°W

Depth : Depth of starting Rupture 

147.0 km

Region : Hidalgotitlan, Mexico

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

a) 32km (20mi) SSE of Hidalgotitlan, Mexico

b) 51km (32mi) S of Minatitlan, Mexico

c) 54km (34mi) SSE of Cosoleacaque, Mexico

d) 55km (34mi) SSE of Oteapan, Mexico

e) 532km (331mi) NW of Guatemala City, Guatemala

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.4 mb	± 0.0
Location	17.523°N 94.497°W	± 8.5 km
Depth	147.0 km	± 8.5
Number of Phase Applied1	146
Minimum Distance2	286.53 km (2.57°)
Travel Time Residual3	1.43 sec
Azimuthal Gap4	126°

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)