Download Event Information
Origin
PublicID |
2015p795690 |
UTC Time |
2015-10-22T09:43:59Z |
Latitude |
-41.20 (± 0.9
km)
|
Longitude |
175.08 (± 1.3
km)
|
Depth |
6 km (± 2 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
52 |
Used Station Count |
46 |
Standard Error |
0.80 (s) |
Azimuthal Gap |
55.14 (degrees) |
Minimum Distance |
0.06 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.4 |
|
MLv |
4.4 (± 0.3) |
155 |
ML |
4.6 (± 0.2) |
18 |
M |
4.4 |
155 |
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).