Download Event Information
Origin
PublicID |
2022p372060 |
UTC Time |
2022-05-18T15:53:14Z |
Latitude |
-31.67 (± 7.1
km)
|
Longitude |
-179.15 (± 16.1
km)
|
Depth |
300 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
24 |
Used Station Count |
18 |
Standard Error |
1.73 (s) |
Azimuthal Gap |
172.81 (degrees) |
Minimum Distance |
2.63 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.7 (± 0.2) |
|
mB |
4.7 (± 0.2) |
6 |
Mw(mB) |
3.9 (± 0.4) |
6 |
MLv |
4.7 (± 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).