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Origin
PublicID |
2021p195907 |
UTC Time |
2021-03-14T11:39:30Z |
Latitude |
-40.88 (± 2.9
km)
|
Longitude |
175.46 (± 2.6
km)
|
Depth |
17 km (± 4 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
26 |
Used Station Count |
20 |
Standard Error |
0.60 (s) |
Azimuthal Gap |
64.23 (degrees) |
Minimum Distance |
0.05 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.7 |
|
M |
3.7 |
36 |
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).