Download Event Information
Origin
PublicID |
2020p902452 |
UTC Time |
2020-11-29T21:45:25Z |
Latitude |
-32.28 (± 6.0
km)
|
Longitude |
-179.90 (± 11.3
km)
|
Depth |
467 km (± 10 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
47 |
Used Station Count |
41 |
Standard Error |
0.81 (s) |
Azimuthal Gap |
156.89 (degrees) |
Minimum Distance |
3.46 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
5.4 (± 0.2) |
|
ML |
5.4 (± 0.2) |
6 |
MLv |
5.7 (± 0.2) |
25 |
mB |
5.4 (± 0.2) |
25 |
Mw(mB) |
4.8 (± 0.4) |
25 |
M |
4.9 |
25 |
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).