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Origin
PublicID |
2019p299265 |
UTC Time |
2019-04-21T17:25:18Z |
Latitude |
-32.38 (± 14.8
km)
|
Longitude |
179.61 (± 36.1
km)
|
Depth |
409 km (± 17 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
41 |
Used Station Count |
23 |
Standard Error |
1.59 (s) |
Azimuthal Gap |
349.61 (degrees) |
Minimum Distance |
5.28 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.9 |
|
MLv |
4.0 (± 0.0) |
4 |
mB |
4.2 (± 0.0) |
3 |
Mw(mB) |
3.3 (± 0.4) |
3 |
M |
3.9 |
4 |
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).