Download Event Information
Origin
PublicID |
2018p045832 |
UTC Time |
2018-01-17T22:59:24Z |
Latitude |
-40.05 (± 20.7
km)
|
Longitude |
175.46 (± 15.1
km)
|
Depth |
45 km (± 21 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
39 |
Used Station Count |
39 |
Standard Error |
1.02 (s) |
Azimuthal Gap |
165.13 (degrees) |
Minimum Distance |
0.62 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.9 |
|
MLv |
3.9 (± 0.7) |
25 |
M |
3.9 |
25 |
mB |
5.1 |
1 |
Mw(mB) |
4.4 (± 0.4) |
1 |
ML |
4.0 (± 0.6) |
31 |
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).