Download Event Information
Origin
PublicID |
2023p076838 |
UTC Time |
2023-01-29T10:19:17Z |
Latitude |
-40.08 (± 2.7
km)
|
Longitude |
176.37 (± 3.1
km)
|
Depth |
21 km (± 7 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
23 |
Used Station Count |
16 |
Standard Error |
0.30 (s) |
Azimuthal Gap |
50.17 (degrees) |
Minimum Distance |
0.06 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
1.9 (± 0.2) |
|
ML |
1.9 (± 0.2) |
10 |
MLv |
1.9 (± 0.2) |
7 |
M |
1.9 |
7 |
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).