Download Event Information
Origin
PublicID |
2023p558917 |
UTC Time |
2023-07-26T19:11:21Z |
Latitude |
-40.21 (± 1.9
km)
|
Longitude |
175.34 (± 2.1
km)
|
Depth |
19 km (± 3 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
55 |
Used Station Count |
39 |
Standard Error |
0.72 (s) |
Azimuthal Gap |
81.13 (degrees) |
Minimum Distance |
0.02 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
3.5 (± 0.2) |
|
MLv |
3.5 (± 0.2) |
62 |
ML |
3.4 (± 0.2) |
18 |
M |
3.5 |
62 |
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).