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Origin
PublicID |
3124791 |
UTC Time |
2009-07-15T09:38:22Z |
Latitude |
-40.18 (± 0.0
km)
|
Longitude |
173.55 (± 0.0
km)
|
Depth |
167 km (± 3 km) |
Depth Type |
free |
Earth Model |
nz1dr |
Used Phase Count |
69 |
Used Station Count |
66 |
Standard Error |
0.21 (s) |
Azimuthal Gap |
144.00 (degrees) |
Minimum Distance |
0.68 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (ML) |
5.4 (± 0.3) |
|
ML |
5.4 (± 0.3) |
36 |
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).