Friday, May 17, 2013

Magnitude 4.2 Earthquake of Rolleston, New Zealand 2013 May 17

2013-05-17 03:59:08 UTC : Rolleston, New Zealand EARTHQUAKE

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Magnitude: 4.2

Event Time: Time and Date Starting of Earthquake Rupture 

2013-05-17 03:59:08 UTC

2013-05-17 15:59:08 UTC+12:00 at epicenter


Earthquake data:

Location : Position of Epicenter 

43.625°S 172.426°E

Depth : Depth of starting Rupture 

14.6km (9.1mi)

Region : Rolleston, New Zealand
rolleston, new zealand earthquake 2013 MAY 17

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

a) 5km (3mi) SE of Rolleston, New Zealand

b) 19km (12mi) WSW of Christchurch, New Zealand

c) 32km (20mi) SSW of Kaiapoi, New Zealand

d) 
127km (79mi) NE of Timaru, New Zealand

e) 323km (201mi) SW of Wellington, New Zealand

Location Uncertainty: 
Parameter
Value
Uncertainty
Magnitude
4.2 ML
--
Location
43.625°S, 172.426°E
± 30.7 km
Depth
14.6 km
± 4.7 km
Number of Phase Applied1
16

Minimum Distance2
16.7 km (0.15°)

Travel Time Residual3
0.57 sec

Azimuthal Gap4
105°

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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