Download Event Information
Origin
PublicID |
2023p900372 |
UTC Time |
2023-11-30T03:18:45Z |
Latitude |
-37.90 (± 3.9
km)
|
Longitude |
177.16 (± 2.9
km)
|
Depth |
51 km (± 5 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
47 |
Used Station Count |
40 |
Standard Error |
0.62 (s) |
Azimuthal Gap |
115.69 (degrees) |
Minimum Distance |
0.15 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
4.2 (± 0.3) |
|
MLv |
4.2 (± 0.3) |
99 |
ML |
4.0 (± 0.5) |
27 |
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).