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Origin
PublicID |
2017p318793 |
UTC Time |
2017-04-28T22:53:17Z |
Latitude |
-41.46 (± 4.4
km)
|
Longitude |
174.52 (± 5.4
km)
|
Depth |
20 km (± 8 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
16 |
Used Station Count |
16 |
Standard Error |
0.38 (s) |
Azimuthal Gap |
134.29 (degrees) |
Minimum Distance |
0.26 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.0 |
|
ML |
2.3 (± 0.3) |
12 |
MLv |
2.0 (± 0.1) |
9 |
M |
2.0 |
9 |
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).