Download Event Information
Origin
PublicID |
2015p158675 |
UTC Time |
2015-02-28T17:02:14Z |
Latitude |
-36.90 (± 55.4
km)
|
Longitude |
177.32 (± 30.1
km)
|
Depth |
258 km (± 72 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
17 |
Used Station Count |
17 |
Standard Error |
0.72 (s) |
Azimuthal Gap |
279.55 (degrees) |
Minimum Distance |
1.09 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.3 |
|
ML |
3.1 (± 0.7) |
9 |
MLv |
3.3 (± 0.7) |
12 |
M |
3.3 |
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).