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Origin
PublicID |
3468635 |
UTC Time |
2011-02-22T01:50:29Z |
Latitude |
-43.59 (± 0.0
km)
|
Longitude |
172.63 (± 0.0
km)
|
Depth |
7 km (± 1 km) |
Depth Type |
free |
Earth Model |
nz1dr |
Used Phase Count |
40 |
Used Station Count |
36 |
Standard Error |
0.20 (s) |
Azimuthal Gap |
76.00 (degrees) |
Minimum Distance |
0.02 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (Mw) |
5.6 |
|
ML |
5.9 (± 0.4) |
107 |
Mw |
5.6 |
0 |
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).