Download Event Information
Origin
PublicID |
2022p730484 |
UTC Time |
2022-09-28T06:40:36Z |
Latitude |
-31.59 (± 20.2
km)
|
Longitude |
-179.25 (± 26.7
km)
|
Depth |
276 km (± 66 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
19 |
Used Station Count |
13 |
Standard Error |
0.90 (s) |
Azimuthal Gap |
327.40 (degrees) |
Minimum Distance |
6.51 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.1 (± 0.1) |
|
MLv |
4.5 (± 0.2) |
4 |
ML |
4.3 (± 0.4) |
2 |
mB |
4.1 (± 0.1) |
3 |
Mw(mB) |
3.2 (± 0.4) |
5 |
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).