Download Event Information
Origin
PublicID |
2018p281413 |
UTC Time |
2018-04-15T02:56:44Z |
Latitude |
-35.07 (± 5.2
km)
|
Longitude |
-178.90 (± 9.7
km)
|
Depth |
33 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
44 |
Used Station Count |
27 |
Standard Error |
1.20 (s) |
Azimuthal Gap |
204.38 (degrees) |
Minimum Distance |
3.36 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.4 |
|
MLv |
4.4 (± 0.1) |
14 |
ML |
4.6 (± 0.2) |
18 |
mB |
4.8 |
1 |
Mw(mB) |
4.0 (± 0.4) |
1 |
M |
4.4 |
14 |
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).