Download Event Information
Origin
PublicID |
2018p301101 |
UTC Time |
2018-04-22T09:46:32Z |
Latitude |
-38.47 (± 1.3
km)
|
Longitude |
176.21 (± 1.2
km)
|
Depth |
6 km (± 3 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
14 |
Used Station Count |
9 |
Standard Error |
0.32 (s) |
Azimuthal Gap |
64.17 (degrees) |
Minimum Distance |
0.06 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.2 |
|
MLv |
1.2 (± 0.1) |
7 |
ML |
1.5 (± 0.2) |
7 |
M |
1.2 |
7 |
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).