Magnitude 3.9, Thu Aug 6 2026 6:00 AM


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Origin


PublicID 2026p585815
UTC Time 2026-08-05T18:00:02Z
Latitude -35.44 (± 37.9 km)
Longitude 179.93 (± 40.6 km)
Depth 195 km (± 61 km)
Depth Type free
Earth Model iasp91
Used Phase Count 12
Used Station Count 9
Standard Error 0.60 (s)
Azimuthal Gap 345.97 (degrees)
Minimum Distance 2.49 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (MLv) 3.9 (± 0.3)  
MLv 3.9 (± 0.3) 14
MLv 2.9 1
M 3.4 14

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


-12.0-10.0-8.0-6.0-4.0-2.00.02.04.06.08.010.012.0residual (s)012345678Distance (degrees)Pick Residuals

Station Magnitudes (MLv)


0.01.02.03.04.05.0Magnitude34567Distance (degrees)Station Magnitudes (MLv)

Station Magnitudes (MLv)


0.01.02.03.0MagnitudeDistance (degrees)Station Magnitudes (MLv)

Magnitude Residuals (MLv)


-1.00.01.0Residual34567Distance (degrees)Magnitude Residuals (MLv)

Magnitude Residuals (MLv)


-1.00.01.0ResidualDistance (degrees)Magnitude Residuals (MLv)