Download Event Information
Origin
PublicID |
2020p899539 |
UTC Time |
2020-11-28T19:54:31Z |
Latitude |
-40.52 (± 2.4
km)
|
Longitude |
175.85 (± 2.8
km)
|
Depth |
23 km (± 5 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
29 |
Used Station Count |
20 |
Standard Error |
0.43 (s) |
Azimuthal Gap |
68.61 (degrees) |
Minimum Distance |
0.10 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.9 |
|
ML |
1.9 (± 0.3) |
12 |
MLv |
1.9 (± 0.4) |
7 |
M |
1.9 |
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).