Download Event Information
Origin
PublicID |
2021p016558 |
UTC Time |
2021-01-07T03:02:34Z |
Latitude |
-38.40 (± 2.1
km)
|
Longitude |
178.20 (± 3.2
km)
|
Depth |
24 km (± 3 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
57 |
Used Station Count |
40 |
Standard Error |
0.85 (s) |
Azimuthal Gap |
109.39 (degrees) |
Minimum Distance |
0.08 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.1 |
|
ML |
3.1 (± 0.2) |
31 |
MLv |
3.1 (± 0.2) |
29 |
M |
3.1 |
29 |
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).