Download Event Information
Origin
PublicID |
2015p673080 |
UTC Time |
2015-09-07T00:57:15Z |
Latitude |
-43.58 (± 2.3
km)
|
Longitude |
172.67 (± 2.6
km)
|
Depth |
5 km (± 5 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
22 |
Used Station Count |
11 |
Standard Error |
0.51 (s) |
Azimuthal Gap |
92.75 (degrees) |
Minimum Distance |
0.12 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.8 |
|
MLv |
2.8 (± 0.1) |
9 |
ML |
3.0 (± 0.1) |
9 |
M |
2.8 |
9 |
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).