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Origin
PublicID |
2017p037810 |
UTC Time |
2017-01-14T23:45:20Z |
Latitude |
-42.24 (± 4.1
km)
|
Longitude |
173.63 (± 7.0
km)
|
Depth |
7 km (± 7 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
13 |
Used Station Count |
10 |
Standard Error |
0.46 (s) |
Azimuthal Gap |
174.69 (degrees) |
Minimum Distance |
0.19 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.2 |
|
MLv |
3.2 (± 0.1) |
7 |
ML |
3.3 (± 0.2) |
8 |
M |
3.2 |
7 |
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).