Download Event Information
Origin
PublicID |
2021p018976 |
UTC Time |
2021-01-08T00:28:47Z |
Latitude |
-29.77 (± 2.6
km)
|
Longitude |
-178.47 (± 4.2
km)
|
Depth |
225 km (± 4 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
41 |
Used Station Count |
31 |
Standard Error |
2.59 (s) |
Azimuthal Gap |
129.53 (degrees) |
Minimum Distance |
0.70 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
6.0 (± 0.2) |
|
ML |
6.0 (± 0.4) |
4 |
MLv |
6.4 (± 0.6) |
5 |
mB |
6.0 (± 0.2) |
19 |
Mw(mB) |
5.7 (± 0.4) |
19 |
M |
5.8 |
19 |
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).