Download Event Information
Origin
PublicID |
2020p042145 |
UTC Time |
2020-01-16T14:13:20Z |
Latitude |
-31.75 (± 6.8
km)
|
Longitude |
178.60 (± 13.6
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
41 |
Used Station Count |
25 |
Standard Error |
2.41 (s) |
Azimuthal Gap |
214.27 (degrees) |
Minimum Distance |
3.90 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.8 (± 0.1) |
|
ML |
4.1 (± 0.2) |
8 |
MLv |
4.2 (± 0.1) |
7 |
mB |
4.8 (± 0.1) |
4 |
Mw(mB) |
4.0 (± 0.4) |
4 |
M |
4.2 |
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).