Magnitude 3.3, Mon Jul 27 2026 4:20 AM


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Origin


PublicID 2026p558599
UTC Time 2026-07-26T16:20:14Z
Latitude -30.83 (± 48.2 km)
Longitude -179.40 (± 74.1 km)
Depth 386 km (± 134 km)
Depth Type free
Earth Model iasp91
Used Phase Count 12
Used Station Count 7
Standard Error 0.74 (s)
Azimuthal Gap 353.67 (degrees)
Minimum Distance 6.98 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (Mw(mB)) 3.3 (± 0.4)  
MLv 4.8 (± 0.6) 2
mB 4.2 (± 0.2) 20
Mw(mB) 3.3 (± 0.4) 20
M 3.7 20

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)024681012Distance (degrees)Pick Residuals

Station Magnitudes (MLv)


0.01.02.03.04.05.06.0MagnitudeDistance (degrees)Station Magnitudes (MLv)

Station Magnitudes (mB)


0.01.02.03.04.05.06.0Magnitude810Distance (degrees)Station Magnitudes (mB)

Magnitude Residuals (MLv)


-1.00.01.0ResidualDistance (degrees)Magnitude Residuals (MLv)

Magnitude Residuals (mB)


-2.0-1.00.01.02.0Residual810Distance (degrees)Magnitude Residuals (mB)