Download Event Information
Origin
PublicID |
2018p107742 |
UTC Time |
2018-02-09T20:45:14Z |
Latitude |
-40.09 (± 4.4
km)
|
Longitude |
176.63 (± 6.4
km)
|
Depth |
34 km (± 8 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
23 |
Used Station Count |
23 |
Standard Error |
0.42 (s) |
Azimuthal Gap |
108.25 (degrees) |
Minimum Distance |
0.15 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.6 |
|
ML |
1.9 (± 0.3) |
18 |
MLv |
1.6 (± 0.2) |
12 |
M |
1.6 |
12 |
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).