Download Event Information
Origin
PublicID |
2024p703720 |
UTC Time |
2024-09-17T09:00:36Z |
Latitude |
-30.96 (± 6.8
km)
|
Longitude |
-178.33 (± 17.1
km)
|
Depth |
100 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
13 |
Used Station Count |
12 |
Standard Error |
1.55 (s) |
Azimuthal Gap |
139.76 (degrees) |
Minimum Distance |
1.73 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (Mw(mB)) |
4.2 (± 0.4) |
|
MLv |
5.3 (± 0.3) |
4 |
ML |
4.8 |
1 |
mB |
4.9 (± 0.1) |
4 |
Mw(mB) |
4.2 (± 0.4) |
4 |
M |
5.0 |
4 |
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).