Magnitude 6.6, Mon Aug 2 1943 12:46 PM

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PublicID 1542356
UTC Time 1943-08-02T00:46:35Z
Latitude -45.64 (± 0.3 km)
Longitude 166.67 (± 0.3 km)
Depth 33 km (± 0 km)
Depth Type operator assigned
Earth Model nz1dr
Used Phase Count 10
Used Station Count 6
Standard Error 0.52 (s)
Azimuthal Gap 207.00 (degrees)
Minimum Distance 0.68 (degrees)


Type Magnitude Station Count
Preferred (Mw) 6.6  
ML 6.1 (± 0.3) 4
Mw 6.6 0
MS 6.6 0

GeoNet combines magnitudes into a summary magnitude, M, which consists of a weighted average of the individual magnitudes and attempts to be a best possible compromise between all magnitudes for a range of earthquake sizes. Summary magnitude for GeoNet is then defined as:

M = (2 * MLv + (0.4 * number_of stations(Mw(mB)) - 1) * Mw(mB)) / (2 + (0.4 * number_of_stations(Mw(mB)) - 1))

Where MLv is local magnitude calculated on the vertical component and Mw(mB) is a Mw estimation based of mB by Bormann and Saul (2008).

Origin Map

Map of New Zealand.

Map showing stations with picks used to locate the earthquake. Stations with picks that have a zero weight in the solution are shown as small grey circles. Those with a higher weight are shown as larger circles. The quake is shown by the largest circle.

Pick Residuals

-21.0-19.0-17.0-15.0-13.0-11.0-9.0-7.0-5.0-3.0- (s)0246810121416Distance (degrees)Pick Residuals

Station Magnitudes (ML) (degrees)Station Magnitudes (ML)

Magnitude Residuals (ML)

- (degrees)Magnitude Residuals (ML)