Monday, September 22, 2014

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

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

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

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

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

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

Location Uncertainty: 
3.4 Md
± 0.00
19.659°N, 65.590°W
± 3.2 km
43.0 km
± 19.3 km
Number of Phase Applied1

Minimum Distance2
156.1 km (1.40°)

Travel Time Residual3
0.37 sec

Azimuthal Gap4

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)

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