Magnitude 4.5 Earthquake of Calama, Chile 2014-09-28

2014-09-28 09:49:04 UTC : Calama, Chile EARTHQUAKE

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Magnitude: 4.5

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-28 09:49:04 UTC

1. 2014-09-28 06:49:04 UTC-03:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

21.881°S 68.668°W

Depth : Depth of starting Rupture 

125.6km (78.0mi)

Region : Calama, Chile

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

a)  70km (43mi) NNE of Calama, Chile

b)  159km (99mi) E of Tocopilla, Chile

c)  239km (149mi) SE of Iquique, Chile

d)  247km (153mi) SW of Uyuni, Bolivia

e)  598km (372mi) S of La Paz, Bolivia

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	4.5 mb	± 0.06
Location	21.881°S, 68.668°W	--
Depth	125.6 km	± 5.4 km
Number of Phase Applied1	100
Minimum Distance2	60.1 km (0.54°)
Travel Time Residual3	0.80 sec
Azimuthal Gap4	54°

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)