Download Event Information
Origin
PublicID |
2022p055017 |
UTC Time |
2022-01-21T08:31:57Z |
Latitude |
-31.80 (± 29.0
km)
|
Longitude |
179.51 (± 46.4
km)
|
Depth |
414 km (± 60 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
20 |
Used Station Count |
13 |
Standard Error |
0.82 (s) |
Azimuthal Gap |
346.20 (degrees) |
Minimum Distance |
6.07 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.0 (± 0.1) |
|
MLv |
4.2 (± 0.1) |
4 |
ML |
4.0 (± 0.0) |
6 |
mB |
4.0 (± 0.1) |
12 |
Mw(mB) |
3.0 (± 0.4) |
6 |
M |
3.7 |
6 |
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).