Magnitude 3.2, Tue Dec 6 2016 4:04 AM


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Origin


PublicID 2016p917917
UTC Time 2016-12-05T15:04:03Z
Latitude -23.23 (± 0.0 km)
Longitude -179.73 (± 0.0 km)
Depth 554 km (± 0 km)
Depth Type free
Earth Model
Used Phase Count 0
Used Station Count 0
Standard Error 4.09 (s)
Azimuthal Gap 0.00 (degrees)
Minimum Distance 0.00 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (M) 3.2  
mB 4.2 (± 0.2) 5
Mw(mB) 3.2 (± 0.4) 5
M 3.2 5

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


-13.0-11.0-9.0-7.0-5.0-3.0-1.01.03.05.07.09.011.013.0residual (s)0246810121416Distance (degrees)Pick Residuals

Station Magnitudes (mB)


0.01.02.03.04.05.0Magnitude15Distance (degrees)Station Magnitudes (mB)

Magnitude Residuals (mB)


-1.00.01.0Residual15Distance (degrees)Magnitude Residuals (mB)