Download Event Information
Origin
PublicID |
2021p302573 |
UTC Time |
2021-04-22T22:48:24Z |
Latitude |
-24.18 (± 13.8
km)
|
Longitude |
-178.85 (± 53.7
km)
|
Depth |
500 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
14 |
Used Station Count |
11 |
Standard Error |
1.60 (s) |
Azimuthal Gap |
342.16 (degrees) |
Minimum Distance |
12.80 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.4 (± 0.2) |
|
Mw(mB) |
3.6 (± 0.4) |
1 |
mB |
4.4 (± 0.2) |
6 |
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).