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Origin
PublicID |
2019p630295 |
UTC Time |
2019-08-22T05:00:31Z |
Latitude |
-34.83 (± 7.8
km)
|
Longitude |
179.42 (± 11.5
km)
|
Depth |
224 km (± 14 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
47 |
Used Station Count |
29 |
Standard Error |
0.96 (s) |
Azimuthal Gap |
301.01 (degrees) |
Minimum Distance |
2.87 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.0 |
|
ML |
4.1 (± 0.2) |
8 |
MLv |
4.0 (± 0.1) |
13 |
mB |
4.3 (± 0.3) |
2 |
Mw(mB) |
3.4 (± 0.4) |
2 |
M |
4.0 |
13 |
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).