Download Event Information
Origin
PublicID |
2023p874390 |
UTC Time |
2023-11-20T12:35:07Z |
Latitude |
-39.30 (± 13.5
km)
|
Longitude |
174.43 (± 7.7
km)
|
Depth |
136 km (± 9 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
19 |
Used Station Count |
11 |
Standard Error |
0.43 (s) |
Azimuthal Gap |
128.21 (degrees) |
Minimum Distance |
0.16 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
2.3 (± 0.3) |
|
ML |
2.1 (± 0.4) |
6 |
MLv |
2.3 (± 0.3) |
18 |
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).