Magnitude 7.2, Tue Sep 29 1953 1:36 PM

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PublicID 1544823
UTC Time 1953-09-29T01:36:51Z
Latitude -37.60 (± 0.1 km)
Longitude 176.48 (± 0.1 km)
Depth 273 km (± 13 km)
Depth Type free
Earth Model nz1d
Used Phase Count 9
Used Station Count 6
Standard Error 0.70 (s)
Azimuthal Gap 218.00 (degrees)
Minimum Distance 0.81 (degrees)


Type Magnitude Station Count
Preferred (ML) 7.2  
ML 7.2 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

-4.0-3.0-2.0- (s)01234Distance (degrees)Pick Residuals