Download Event Information
Origin
PublicID |
2015p081430 |
UTC Time |
2015-01-31T03:04:37Z |
Latitude |
-32.08 (± 9.2
km)
|
Longitude |
-178.54 (± 26.6
km)
|
Depth |
33 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
46 |
Used Station Count |
31 |
Standard Error |
2.02 (s) |
Azimuthal Gap |
190.28 (degrees) |
Minimum Distance |
2.86 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.5 |
|
MLv |
4.8 (± 0.1) |
24 |
ML |
4.9 (± 0.2) |
22 |
mB |
5.0 (± 0.1) |
13 |
Mw(mB) |
4.3 (± 0.4) |
13 |
M |
4.5 |
24 |
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).