Download Event Information
Origin
PublicID |
2015p868153 |
UTC Time |
2015-11-18T05:12:06Z |
Latitude |
-42.48 (± 3.5
km)
|
Longitude |
173.79 (± 5.8
km)
|
Depth |
13 km (± 5 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
18 |
Used Station Count |
10 |
Standard Error |
0.92 (s) |
Azimuthal Gap |
196.94 (degrees) |
Minimum Distance |
0.20 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.7 |
|
MLv |
2.7 (± 0.5) |
4 |
ML |
2.6 (± 0.3) |
8 |
M |
2.7 |
4 |
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).