Magnitude 3.4, Sat Nov 23 2024 8:53 AM


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Origin


PublicID 2024p883325
UTC Time 2024-11-22T19:53:18Z
Latitude -31.14 (± 23.5 km)
Longitude 179.93 (± 81.9 km)
Depth 288 km (± 132 km)
Depth Type free
Earth Model iasp91
Used Phase Count 8
Used Station Count 8
Standard Error 0.75 (s)
Azimuthal Gap 207.98 (degrees)
Minimum Distance 2.64 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (Mw(mB)) 3.4 (± 0.4)  
mB 4.3 (± 0.0) 2
Mw(mB) 3.4 (± 0.4) 2

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


-7.0-5.0-3.0-1.01.03.05.07.0residual (s)024681012Distance (degrees)Pick Residuals

Station Magnitudes (mB)


0.01.02.03.04.05.0Magnitude11Distance (degrees)Station Magnitudes (mB)

Magnitude Residuals (mB)


-1.00.01.0Residual11Distance (degrees)Magnitude Residuals (mB)