Magnitude 1.0, Tue Sep 2 2014 11:11 PM


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Origin


PublicID 2014p660720
UTC Time 2014-09-02T11:11:35Z
Latitude -39.24 (± 1.9 km)
Longitude 175.24 (± 1.8 km)
Depth 14 km (± 4 km)
Depth Type free
Earth Model nz3drx
Used Phase Count 11
Used Station Count 8
Standard Error 0.13 (s)
Azimuthal Gap 272.36 (degrees)
Minimum Distance 0.23 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (M) 1.0  
ML 1.3 (± 0.1) 6
MLv 1.0 (± 0.3) 6
M 1.0 6

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)012Distance (degrees)Pick Residuals

Station Magnitudes (ML)


0.01.02.0MagnitudeDistance (degrees)Station Magnitudes (ML)

Station Magnitudes (MLv)


0.01.02.0MagnitudeDistance (degrees)Station Magnitudes (MLv)

Magnitude Residuals (ML)


-1.00.01.0ResidualDistance (degrees)Magnitude Residuals (ML)

Magnitude Residuals (MLv)


-1.00.01.0ResidualDistance (degrees)Magnitude Residuals (MLv)