Download Event Information
Origin
PublicID |
2021p059814 |
UTC Time |
2021-01-23T03:07:58Z |
Latitude |
-32.03 (± 33.9
km)
|
Longitude |
179.30 (± 67.0
km)
|
Depth |
381 km (± 62 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
21 |
Used Station Count |
15 |
Standard Error |
1.13 (s) |
Azimuthal Gap |
351.45 (degrees) |
Minimum Distance |
5.58 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.4 (± 0.2) |
|
mB |
4.4 (± 0.2) |
17 |
Mw(mB) |
3.6 (± 0.4) |
6 |
ML |
4.1 (± 0.1) |
13 |
MLv |
4.5 (± 0.2) |
9 |
M |
4.1 |
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).