Magnitude 6.1 Earthquake of Kaikoura, New Zealand 2015-04-24

2015-04-24 03:36:43 (UTC) :North-West of Kaikoura, New Zealand

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Magnitude : 6.1

Event Time: Time and Date Starting of Earthquake Rupture 

• 2015-04-24 03:36:43 (UTC)

Earthquake data:

Location : Position of Epicenter 

42.063°S 172.999°E

Depth : Depth of starting Rupture 

55.0 km

Region : Kaikoura, New Zealand

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

a) 68km (42mi) NW of Kaikoura, New Zealand

b) 82km (51mi) S of Richmond, New Zealand

c) 89km (55mi) SSW of Nelson, New Zealand

d) 99km (62mi) SW of Blenheim, New Zealand

e) 171km (106mi) WSW of Wellington, New Zealand

Location Uncertainty: 

Parameter	Value	Uncertainty
Magnitude	6.1 mww	± 0.1
Location	42.063°S 172.999°E	± 4.6 km
Depth	55.0 km	± 1.8
Number of Phase Applied1	140
Minimum Distance2	34.29 km (0.31°)
Travel Time Residual3	0.97 sec
Azimuthal Gap4	22°

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)