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Origin
PublicID |
2019p633357 |
UTC Time |
2019-08-23T08:09:14Z |
Latitude |
-18.44 (± 116.2
km)
|
Longitude |
-176.55 (± 77.0
km)
|
Depth |
540 km (± 135 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
18 |
Used Station Count |
18 |
Standard Error |
0.86 (s) |
Azimuthal Gap |
257.08 (degrees) |
Minimum Distance |
6.31 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
5.0 (± 0.1) |
|
M |
4.3 |
14 |
Mw(mB) |
4.3 (± 0.4) |
14 |
mB |
5.0 (± 0.1) |
9 |
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).