Download Event Information
Origin
PublicID |
2022p017357 |
UTC Time |
2022-01-07T10:08:16Z |
Latitude |
-40.14 (± 1.8
km)
|
Longitude |
174.04 (± 3.2
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
38 |
Used Station Count |
30 |
Standard Error |
0.46 (s) |
Azimuthal Gap |
111.14 (degrees) |
Minimum Distance |
0.67 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.0 |
|
ML |
4.0 (± 0.2) |
20 |
MLv |
4.0 (± 0.1) |
51 |
M |
4.0 |
51 |
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).