Download Event Information
Origin
PublicID |
2020p067044 |
UTC Time |
2020-01-25T19:19:26Z |
Latitude |
-30.63 (± 3.7
km)
|
Longitude |
-177.08 (± 11.3
km)
|
Depth |
33 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
38 |
Used Station Count |
30 |
Standard Error |
2.80 (s) |
Azimuthal Gap |
207.02 (degrees) |
Minimum Distance |
1.54 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
5.1 (± 0.2) |
|
M |
4.6 |
60 |
MLv |
5.6 (± 0.1) |
9 |
ML |
5.2 (± 0.1) |
8 |
Mw(mB) |
4.5 (± 0.4) |
60 |
mB |
5.1 (± 0.2) |
59 |
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).