Magnitude 4.3 Earthquake of San Pedro de Atacama, Chile 2014-07-18

2014-07-18 09:01:45 UTC : San Pedro de Atacama, Chile EARTHQUAKE

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Magnitude: 4.3

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-18 09:01:45 UTC

1. 2014-07-18 06:01:45 UTC-03:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

24.355°S 67.944°W

Depth : Depth of starting Rupture 

112.6km (69.9mi)

Region : San Pedro de Atacama, Chile

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

a) 161km (100mi) S of San Pedro de Atacama, Chile

b) 232km (144mi) SSE of Calama, Chile

c) 260km (162mi) W of Salta, Argentina

d) 261km (162mi) ESE of Antofagasta, Chile

e) 869km (540mi) S of La Paz, Bolivia

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.3 mb	± 0.12
Location	24.355°S, 67.944°W	--
Depth	112.6 km	± 5.5 km
Number of Phase Applied1	60
Minimum Distance2	189.0 km (1.70°)
Travel Time Residual3	0.94 sec
Azimuthal Gap4	63°

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)