Download Event Information
Origin
PublicID |
2020p057890 |
UTC Time |
2020-01-22T10:01:46Z |
Latitude |
-26.82 (± 6.4
km)
|
Longitude |
-179.65 (± 5.7
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
33 |
Used Station Count |
23 |
Standard Error |
3.08 (s) |
Azimuthal Gap |
310.84 (degrees) |
Minimum Distance |
2.85 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.5 |
|
MLv |
5.0 (± 0.1) |
3 |
ML |
5.1 (± 0.1) |
3 |
mB |
4.7 (± 0.2) |
7 |
Mw(mB) |
4.0 (± 0.4) |
7 |
M |
4.5 |
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).