Download Event Information
Origin
PublicID |
2023p208806 |
UTC Time |
2023-03-19T06:12:19Z |
Latitude |
-38.07 (± 2.6
km)
|
Longitude |
176.72 (± 2.3
km)
|
Depth |
3 km (± 3 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
28 |
Used Station Count |
24 |
Standard Error |
0.40 (s) |
Azimuthal Gap |
67.76 (degrees) |
Minimum Distance |
0.04 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
2.0 (± 0.4) |
|
MLv |
2.0 (± 0.4) |
10 |
ML |
1.8 (± 0.3) |
18 |
M |
2.0 |
10 |
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).