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Origin
PublicID |
2017p388720 |
UTC Time |
2017-05-24T19:50:05Z |
Latitude |
-41.78 (± 2.7
km)
|
Longitude |
174.12 (± 3.2
km)
|
Depth |
8 km (± 4 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
26 |
Used Station Count |
21 |
Standard Error |
0.39 (s) |
Azimuthal Gap |
130.61 (degrees) |
Minimum Distance |
0.08 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.9 |
|
MLv |
3.9 (± 0.2) |
66 |
ML |
4.1 (± 0.2) |
14 |
M |
3.9 |
66 |
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).