Download Event Information
Origin
PublicID |
2022p715831 |
UTC Time |
2022-09-22T20:31:23Z |
Latitude |
-20.07 (± 0.0
km)
|
Longitude |
-177.92 (± 0.0
km)
|
Depth |
554 km (± 0 km) |
Depth Type |
free |
Earth Model |
|
Used Phase Count |
0 |
Used Station Count |
0 |
Standard Error |
2.20 (s) |
Azimuthal Gap |
0.00 (degrees) |
Minimum Distance |
0.00 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.7 (± 0.1) |
|
MLv |
4.0 |
1 |
mB |
4.7 (± 0.1) |
6 |
Mw(mB) |
3.9 (± 0.4) |
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).