Magnitude 3.3, Wed Oct 29 2014 12:31 PM


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Origin


PublicID 2014p813459
UTC Time 2014-10-28T23:31:09Z
Latitude -42.13 (± 153.3 km)
Longitude 173.44 (± 32.6 km)
Depth 40 km (± 37 km)
Depth Type free
Earth Model nz3drx
Used Phase Count 9
Used Station Count 9
Standard Error 0.30 (s)
Azimuthal Gap 292.97 (degrees)
Minimum Distance 0.30 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (M) 3.3  
MLv 3.3 (± 0.4) 7
M 3.3 7
ML 3.5 (± 0.3) 7

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


-1.00.01.0residual (s)0123Distance (degrees)Pick Residuals

Station Magnitudes (MLv)


0.01.02.03.04.05.0Magnitude123Distance (degrees)Station Magnitudes (MLv)

Station Magnitudes (ML)


0.01.02.03.04.05.0Magnitude123Distance (degrees)Station Magnitudes (ML)

Magnitude Residuals (MLv)


-1.00.01.0Residual123Distance (degrees)Magnitude Residuals (MLv)

Magnitude Residuals (ML)


-1.00.01.0Residual123Distance (degrees)Magnitude Residuals (ML)