Magnitude 3.4 Earthquake of Vieques, Puerto Rico 2014-09-22

2014-09-22 02:16:10  UTC : Vieques, Puerto Rico EARTHQUAKE

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Magnitude : 3.4

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-09-22 02:16:10 UTC
2.  

1. 2014-09-21 22:16:10 UTC-04:00 at epicenter
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Earthquake data:

Location : Position of Epicenter 

1. 19.659°N 65.590°W

Depth : Depth of starting Rupture 

43.0km (26.7mi)

Region :Vieques, Puerto Rico

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

a)  138km (86mi) N of Vieques, Puerto Rico

b)    142km (88mi) NNE of San Juan, Puerto Rico

c)  143km (89mi) N of Rio Grande, Puerto Rico

1. 
   

d)  145km (90mi) NNE of Catano, Puerto Rico

1. e)  146km (91mi) NNE of Carolina, Puerto Rico

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	3.4 Md	± 0.00
Location	19.659°N, 65.590°W	± 3.2 km
Depth	43.0 km	± 19.3 km
Number of Phase Applied1	20
Minimum Distance2	156.1 km (1.40°)
Travel Time Residual3	0.37 sec
Azimuthal Gap4	288°

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)