Download Event Information
Origin
PublicID |
2018p107259 |
UTC Time |
2018-02-09T16:27:59Z |
Latitude |
-38.95 (± 10.2
km)
|
Longitude |
175.64 (± 16.3
km)
|
Depth |
111 km (± 17 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
37 |
Used Station Count |
37 |
Standard Error |
1.30 (s) |
Azimuthal Gap |
183.26 (degrees) |
Minimum Distance |
0.17 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.9 |
|
MLv |
1.9 (± 0.5) |
17 |
M |
1.9 |
17 |
ML |
1.0 (± 0.2) |
6 |
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).