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Origin
PublicID |
2017p380015 |
UTC Time |
2017-05-21T14:32:18Z |
Latitude |
-42.67 (± 5.7
km)
|
Longitude |
171.89 (± 8.6
km)
|
Depth |
10 km (± 13 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
12 |
Used Station Count |
12 |
Standard Error |
0.70 (s) |
Azimuthal Gap |
94.41 (degrees) |
Minimum Distance |
0.30 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.7 |
|
ML |
2.3 (± 0.3) |
9 |
MLv |
1.7 (± 0.4) |
3 |
M |
1.7 |
3 |
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).