Magnitude 6.5, Tue Jul 15 2025 9:37 AM


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Origin


PublicID 2025p526782
UTC Time 2025-07-14T21:37:58Z
Latitude 46.18 (± 98.8 km)
Longitude 152.21 (± 92.4 km)
Depth 33 km (± 0 km)
Depth Type operator assigned
Earth Model iasp91
Used Phase Count 8
Used Station Count 8
Standard Error 0.66 (s)
Azimuthal Gap 336.71 (degrees)
Minimum Distance 62.81 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (mB) 6.5 (± 0.2)  
mB 6.5 (± 0.2) 9
Mw(mB) 6.3 (± 0.4) 9
M 6.3 9

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


-10.0-8.0-6.0-4.0-2.00.02.04.06.08.010.0residual (s)024681012141618202224262830323436384042444648505254565860626466687072747678808284868890Distance (degrees)Pick Residuals

Station Magnitudes (mB)


0.01.02.03.04.05.06.07.0Magnitude024681012141618202224262830323436384042444648505254565860626466687072747678808284868890Distance (degrees)Station Magnitudes (mB)

Magnitude Residuals (mB)


-2.0-1.00.01.02.0Residual024681012141618202224262830323436384042444648505254565860626466687072747678808284868890Distance (degrees)Magnitude Residuals (mB)