Download Event Information
Origin
PublicID |
2015p081285 |
UTC Time |
2015-01-31T01:48:55Z |
Latitude |
-41.31 (± 11.4
km)
|
Longitude |
172.71 (± 17.3
km)
|
Depth |
157 km (± 23 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
11 |
Used Station Count |
11 |
Standard Error |
0.34 (s) |
Azimuthal Gap |
151.43 (degrees) |
Minimum Distance |
0.48 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.2 |
|
MLv |
2.2 (± 0.3) |
8 |
M |
2.2 |
8 |
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).