Download Event Information
Origin
PublicID |
2021p012315 |
UTC Time |
2021-01-05T13:21:42Z |
Latitude |
-43.06 (± 3.9
km)
|
Longitude |
170.80 (± 2.3
km)
|
Depth |
5 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
18 |
Used Station Count |
12 |
Standard Error |
0.51 (s) |
Azimuthal Gap |
152.97 (degrees) |
Minimum Distance |
0.05 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.0 |
|
MLv |
2.0 (± 0.2) |
3 |
ML |
1.9 (± 0.2) |
7 |
M |
2.0 |
3 |
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).