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Origin
PublicID |
2018p108112 |
UTC Time |
2018-02-09T23:59:32Z |
Latitude |
-22.36 (± 7.5
km)
|
Longitude |
-179.25 (± 23.1
km)
|
Depth |
610 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
65 |
Used Station Count |
54 |
Standard Error |
1.39 (s) |
Azimuthal Gap |
325.94 (degrees) |
Minimum Distance |
6.98 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.7 |
|
MLv |
6.4 |
1 |
mB |
5.1 (± 0.2) |
30 |
Mw(mB) |
4.4 (± 0.4) |
30 |
M |
4.7 |
30 |
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).