Download Event Information
Origin
PublicID |
2019p284842 |
UTC Time |
2019-04-16T09:22:28Z |
Latitude |
-31.04 (± 4.1
km)
|
Longitude |
-178.20 (± 12.3
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
40 |
Used Station Count |
33 |
Standard Error |
1.67 (s) |
Azimuthal Gap |
167.00 (degrees) |
Minimum Distance |
1.79 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (Mw(mB)) |
5.4 (± 0.4) |
|
MLv |
5.7 (± 0.2) |
8 |
ML |
5.9 (± 0.1) |
8 |
mB |
5.8 (± 0.2) |
12 |
Mw(mB) |
5.4 (± 0.4) |
12 |
M |
5.5 |
12 |
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).