Magnitude 5.3 Earthquake of Vaini, Tonga 2014-07-16

2014-07-16 10:58:27 UTC : Vaini, Tonga EARTHQUAKE

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Magnitude: 5.3

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-16 10:58:27 UTC

1. 2014-07-15 22:58:27 UTC-12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

21.934°S 175.543°W

Depth : Depth of starting Rupture 

23.8km (14.8mi)

Region : Vaini, Tonga

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

a)  88km (55mi) SSW of Vaini, Tonga

b)  95km (59mi) SSW of Nuku`alofa, Tonga

c)   756km (470mi) SE of Suva, Fiji

 d)  810km (503mi) SE of Lambasa, Fiji

e) 867km (539mi) ESE of Nadi, Fiji

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	5.3 mb	± 0.04
Location	21.934°S, 175.543°W	--
Depth	23.8 km	± 3.6 km
Number of Phase Applied1	324
Minimum Distance2	815.6 km (7.33°)
Travel Time Residual3	0.78 sec
Azimuthal Gap4	43°

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)