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Origin
PublicID |
2017p220635 |
UTC Time |
2017-03-23T15:14:53Z |
Latitude |
-37.88 (± 17.1
km)
|
Longitude |
177.28 (± 33.8
km)
|
Depth |
60 km (± 37 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
13 |
Used Station Count |
13 |
Standard Error |
0.85 (s) |
Azimuthal Gap |
221.53 (degrees) |
Minimum Distance |
0.32 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.8 |
|
MLv |
1.8 (± 0.5) |
4 |
M |
1.8 |
4 |
ML |
1.8 (± 0.3) |
6 |
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).