Download Event Information
Origin
PublicID |
2021p779848 |
UTC Time |
2021-10-16T13:02:50Z |
Latitude |
-33.41 (± 10.9
km)
|
Longitude |
-178.92 (± 21.3
km)
|
Depth |
33 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
18 |
Used Station Count |
13 |
Standard Error |
0.89 (s) |
Azimuthal Gap |
320.19 (degrees) |
Minimum Distance |
4.72 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
4.3 (± 0.0) |
|
MLv |
4.3 (± 0.0) |
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).