Download Event Information
Origin
PublicID |
2023p321389 |
UTC Time |
2023-04-29T21:56:20Z |
Latitude |
-40.27 (± 2.4
km)
|
Longitude |
176.57 (± 2.7
km)
|
Depth |
13 km (± 5 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
28 |
Used Station Count |
19 |
Standard Error |
0.52 (s) |
Azimuthal Gap |
109.49 (degrees) |
Minimum Distance |
0.05 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
3.3 (± 0.2) |
|
MLv |
3.3 (± 0.2) |
55 |
ML |
3.5 (± 0.2) |
11 |
M |
3.3 |
55 |
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).