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Origin
PublicID |
2017p295309 |
UTC Time |
2017-04-20T06:21:17Z |
Latitude |
-39.37 (± 9.2
km)
|
Longitude |
175.41 (± 9.7
km)
|
Depth |
15 km (± 15 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
12 |
Used Station Count |
12 |
Standard Error |
0.20 (s) |
Azimuthal Gap |
197.71 (degrees) |
Minimum Distance |
0.05 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.0 |
|
ML |
1.3 (± 0.3) |
9 |
MLv |
1.0 (± 0.2) |
5 |
M |
1.0 |
5 |
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).