Magnitude 3.0, Thu Aug 7 2025 2:08 AM


Download Event Information


Origin


PublicID 2025p588082
UTC Time 2025-08-06T14:08:48Z
Latitude -31.41 (± 30.3 km)
Longitude -179.11 (± 75.2 km)
Depth 300 km (± 0 km)
Depth Type operator assigned
Earth Model iasp91
Used Phase Count 12
Used Station Count 8
Standard Error 0.75 (s)
Azimuthal Gap 353.18 (degrees)
Minimum Distance 6.83 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (Mw(mB)) 3.0 (± 0.4)  
MLv 4.3 (± 0.3) 4
ML 4.4 (± 0.3) 5
mB 4.0 (± 0.1) 3
Mw(mB) 3.0 (± 0.4) 3

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)012345678Distance (degrees)Pick Residuals

Station Magnitudes (MLv)


0.01.02.03.04.05.0Magnitude78Distance (degrees)Station Magnitudes (MLv)

Station Magnitudes (ML)


0.01.02.03.04.05.0Magnitude78Distance (degrees)Station Magnitudes (ML)

Station Magnitudes (mB)


0.01.02.03.04.05.0Magnitude8Distance (degrees)Station Magnitudes (mB)

Magnitude Residuals (MLv)


-1.00.01.0Residual78Distance (degrees)Magnitude Residuals (MLv)

Magnitude Residuals (ML)


-1.00.01.0Residual78Distance (degrees)Magnitude Residuals (ML)

Magnitude Residuals (mB)


-1.00.01.0Residual8Distance (degrees)Magnitude Residuals (mB)