Magnitude 2.9 Earthquake of Stella, Puerto Rico 2014-09-11

2014-09-11 01:59:08 UTC : Stella, Puerto Rico EARTHQUAKE

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Magnitude : 2.9

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-11 11:28:58 UTC

1. 2014-09-11 06:28:58 UTC-05:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

1. 18.129°N 67.636°W

Depth : Depth of starting Rupture 

69.0km (42.9mi)

Region :Stella, Puerto Rico

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

a)  46km (29mi) WSW of Stella, Puerto Rico

b)   52km (32mi) W of Cabo Rojo, Puerto Rico

c)  53km (33mi) W of Mayaguez, Puerto Rico

1. 
   

d)  53km (33mi) W of Hormigueros, Puerto Rico

1. e)  166km (103mi) WSW of San Juan, Puerto Rico

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	2.9 Md	± 0.00
Location	18.129°N, 67.636°W	± 1.5 km
Depth	69.0 km	± 1.3 km
Number of Phase Applied1	22
Minimum Distance2	57.4 km (0.52°)
Travel Time Residual3	0.25 sec
Azimuthal Gap4	191°

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)