Download Event Information
Origin
PublicID |
2023p694617 |
UTC Time |
2023-09-15T00:12:09Z |
Latitude |
-39.26 (± 4.1
km)
|
Longitude |
178.70 (± 6.0
km)
|
Depth |
33 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
32 |
Used Station Count |
28 |
Standard Error |
0.66 (s) |
Azimuthal Gap |
153.64 (degrees) |
Minimum Distance |
0.62 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
3.5 (± 0.1) |
|
ML |
3.4 (± 0.1) |
20 |
MLv |
3.5 (± 0.1) |
27 |
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).