Download Event Information
Origin
PublicID |
2015p662517 |
UTC Time |
2015-09-03T03:09:20Z |
Latitude |
-43.02 (± 2.4
km)
|
Longitude |
171.69 (± 2.2
km)
|
Depth |
4 km (± 3 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
30 |
Used Station Count |
21 |
Standard Error |
0.49 (s) |
Azimuthal Gap |
63.05 (degrees) |
Minimum Distance |
0.35 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.5 |
|
MLv |
3.5 (± 0.2) |
17 |
ML |
3.6 (± 0.1) |
17 |
M |
3.5 |
17 |
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).