Magnitude 6.9 Earthquake of Ndoi Island, Fiji 2014-07-21

2014-07-21 14:54:40 UTC :Ndoi Island, Fiji EARTHQUAKE

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Magnitude: 6.9

Event Time: Time and Date Starting of Earthquake Rupture 

1. 2014-07-21 14:54:40 UTC

1. 2014-07-21 02:54:40 UTC-12:00 at epicenter

Earthquake data:

Location : Position of Epicenter 

19.780°S 178.441°W

Depth : Depth of starting Rupture 

616.1km (382.8mi)

Region : Ndoi Island, Fiji

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

a)  100km (62mi) NNE of Ndoi Island, Fiji

b) 369km (229mi) WNW of Nuku`alofa, Tonga

c)  375km (233mi) ESE of Suva, Fiji

d)  437km (272mi) SSE of Lambasa, Fiji

e)  488km (303mi) ESE of Nadi, Fiji

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	6.9 mwb	± 0.04
Location	19.780°S, 178.441°W	--
Depth	616.1 km	± 4.5 km
Number of Phase Applied1	176
Minimum Distance2	433.0 km (3.89°)
Travel Time Residual3	0.96 sec
Azimuthal Gap4	18°

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)