Download Event Information
Origin
PublicID |
2018p286573 |
UTC Time |
2018-04-17T00:45:54Z |
Latitude |
-38.86 (± 11.3
km)
|
Longitude |
175.00 (± 14.0
km)
|
Depth |
180 km (± 18 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
19 |
Used Station Count |
13 |
Standard Error |
0.25 (s) |
Azimuthal Gap |
270.79 (degrees) |
Minimum Distance |
0.53 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.9 |
|
MLv |
2.9 (± 0.5) |
5 |
ML |
3.1 (± 0.1) |
6 |
M |
2.9 |
5 |
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).