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Origin
PublicID |
2017p511997 |
UTC Time |
2017-07-09T10:32:29Z |
Latitude |
-40.31 (± 2.7
km)
|
Longitude |
176.52 (± 4.9
km)
|
Depth |
20 km (± 6 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
28 |
Used Station Count |
28 |
Standard Error |
0.54 (s) |
Azimuthal Gap |
130.68 (degrees) |
Minimum Distance |
0.10 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.4 |
|
ML |
2.7 (± 0.1) |
20 |
MLv |
2.4 (± 0.2) |
17 |
M |
2.4 |
17 |
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).