Download Event Information
Origin
PublicID |
2016p167557 |
UTC Time |
2016-03-02T23:54:28Z |
Latitude |
-40.12 (± 1.5
km)
|
Longitude |
174.86 (± 2.1
km)
|
Depth |
18 km (± 4 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
97 |
Used Station Count |
84 |
Standard Error |
0.74 (s) |
Azimuthal Gap |
64.99 (degrees) |
Minimum Distance |
0.36 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.6 |
|
MLv |
4.6 (± 0.1) |
64 |
ML |
4.9 (± 0.2) |
64 |
M |
4.6 |
64 |
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).