Magnitude 5.3, Tue Aug 29 2000 3:50 PM


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Origin


PublicID 1602528
UTC Time 2000-08-29T03:50:42Z
Latitude -45.07 (± 0.0 km)
Longitude 167.60 (± 0.0 km)
Depth 117 km (± 2 km)
Depth Type free
Earth Model nz1dr
Used Phase Count 15
Used Station Count 9
Standard Error 0.16 (s)
Azimuthal Gap 223.00 (degrees)
Minimum Distance 0.46 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (ML) 5.3 (± 0.1)  
ML 5.3 (± 0.1) 10

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


-6.0-4.0-2.00.02.04.06.0residual (s)0123456789Distance (degrees)Pick Residuals

Station Magnitudes (ML)


0.01.02.03.04.05.06.0Magnitude0Distance (degrees)Station Magnitudes (ML)

Magnitude Residuals (ML)


-1.00.01.0Residual0Distance (degrees)Magnitude Residuals (ML)