Download Event Information
Origin
PublicID |
2015p159162 |
UTC Time |
2015-02-28T21:21:23Z |
Latitude |
-33.68 (± 15.2
km)
|
Longitude |
178.41 (± 19.6
km)
|
Depth |
460 km (± 25 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
23 |
Used Station Count |
16 |
Standard Error |
0.51 (s) |
Azimuthal Gap |
293.63 (degrees) |
Minimum Distance |
3.87 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.7 |
|
MLv |
3.7 (± 0.2) |
12 |
ML |
3.9 (± 0.2) |
11 |
mB |
3.9 |
1 |
Mw(mB) |
2.8 (± 0.4) |
1 |
M |
3.7 |
12 |
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).