Download Event Information
Origin
PublicID |
2023p205484 |
UTC Time |
2023-03-18T00:42:06Z |
Latitude |
-43.66 (± 2.2
km)
|
Longitude |
172.83 (± 2.0
km)
|
Depth |
5 km (± 2 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
47 |
Used Station Count |
30 |
Standard Error |
0.60 (s) |
Azimuthal Gap |
86.20 (degrees) |
Minimum Distance |
0.08 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
4.7 (± 0.2) |
|
MLv |
4.7 (± 0.2) |
84 |
ML |
4.5 (± 0.2) |
12 |
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).