Download Event Information
Origin
PublicID |
2018p309156 |
UTC Time |
2018-04-25T09:18:22Z |
Latitude |
-40.90 (± 2.4
km)
|
Longitude |
175.80 (± 3.8
km)
|
Depth |
24 km (± 6 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
31 |
Used Station Count |
31 |
Standard Error |
0.56 (s) |
Azimuthal Gap |
71.96 (degrees) |
Minimum Distance |
0.13 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.0 |
|
ML |
2.3 (± 0.2) |
23 |
MLv |
2.0 (± 0.2) |
20 |
M |
2.0 |
20 |
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).