Magnitude 2.6, Tue May 27 2025 6:58 PM


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Origin


PublicID 2025p395382
UTC Time 2025-05-27T06:58:08Z
Latitude -30.80 (± 37.7 km)
Longitude -179.97 (± 124.4 km)
Depth 500 km (± 0 km)
Depth Type operator assigned
Earth Model iasp91
Used Phase Count 8
Used Station Count 8
Standard Error 0.57 (s)
Azimuthal Gap 352.72 (degrees)
Minimum Distance 7.18 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (Mw(mB)) 2.6 (± 0.5)  
ML 4.5 (± 0.4) 4
mB 3.7 (± 0.5) 2
Mw(mB) 2.6 (± 0.5) 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


-2.0-1.00.01.02.0residual (s)0246810Distance (degrees)Pick Residuals

Station Magnitudes (ML)


0.01.02.03.04.05.0Magnitude8Distance (degrees)Station Magnitudes (ML)

Station Magnitudes (mB)


0.01.02.03.04.0Magnitude89Distance (degrees)Station Magnitudes (mB)

Magnitude Residuals (ML)


-1.00.01.0Residual8Distance (degrees)Magnitude Residuals (ML)

Magnitude Residuals (mB)


-1.00.01.0Residual89Distance (degrees)Magnitude Residuals (mB)