Download Event Information
Origin
PublicID |
2023p208724 |
UTC Time |
2023-03-19T05:27:38Z |
Latitude |
-31.84 (± 8.2
km)
|
Longitude |
179.79 (± 16.2
km)
|
Depth |
444 km (± 21 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
22 |
Used Station Count |
19 |
Standard Error |
0.73 (s) |
Azimuthal Gap |
163.01 (degrees) |
Minimum Distance |
3.24 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.4 (± 0.6) |
|
MLv |
4.5 (± 0.4) |
8 |
mB |
4.4 (± 0.6) |
6 |
Mw(mB) |
3.6 (± 0.6) |
6 |
M |
4.1 |
8 |
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).