Magnitude 4.8, Mon Oct 7 2024 3:02 PM


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Origin


PublicID 2024p756993
UTC Time 2024-10-07T02:02:44Z
Latitude -23.50 (± 24.4 km)
Longitude -178.83 (± 29.3 km)
Depth 560 km (± 25 km)
Depth Type free
Earth Model iasp91
Used Phase Count 9
Used Station Count 7
Standard Error 1.63 (s)
Azimuthal Gap 215.95 (degrees)
Minimum Distance 5.79 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (mB) 4.8  
mB 4.8 1
Mw(mB) 4.1 (± 0.4) 1

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


-5.0-3.0-1.01.03.05.0residual (s)02468101214161820222426283032343638404244464850Distance (degrees)Pick Residuals

Station Magnitudes (mB)


0.01.02.03.04.05.0MagnitudeDistance (degrees)Station Magnitudes (mB)

Magnitude Residuals (mB)


-1.00.01.0ResidualDistance (degrees)Magnitude Residuals (mB)