Download Event Information
Origin
PublicID |
2016p927224 |
UTC Time |
2016-12-09T01:45:07Z |
Latitude |
-42.34 (± 2.7
km)
|
Longitude |
174.04 (± 3.1
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
46 |
Used Station Count |
40 |
Standard Error |
0.75 (s) |
Azimuthal Gap |
153.68 (degrees) |
Minimum Distance |
0.28 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.9 |
|
ML |
4.2 (± 0.2) |
20 |
MLv |
3.9 (± 0.3) |
40 |
M |
3.9 |
40 |
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).