Magnitude 6.1, Wed Nov 1 2000 11:35 PM


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Origin


PublicID 1635267
UTC Time 2000-11-01T10:35:55Z
Latitude -45.12 (± 0.0 km)
Longitude 166.95 (± 0.0 km)
Depth 9 km (± 0 km)
Depth Type operator assigned
Earth Model nz1dr
Used Phase Count 13
Used Station Count 8
Standard Error 0.13 (s)
Azimuthal Gap 218.00 (degrees)
Minimum Distance 0.38 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (Mw) 6.1  
ML 6.2 (± 0.3) 19
Mw 6.1 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


-4.0-3.0-2.0-1.00.01.02.03.04.0residual (s)02468101214161820222426283032Distance (degrees)Pick Residuals

Station Magnitudes (ML)


0.01.02.03.04.05.06.07.0Magnitude0Distance (degrees)Station Magnitudes (ML)

Magnitude Residuals (ML)


-1.00.01.0Residual0Distance (degrees)Magnitude Residuals (ML)