Download Event Information
Origin
PublicID |
2015p389771 |
UTC Time |
2015-05-25T05:07:25Z |
Latitude |
-23.06 (± 44.5
km)
|
Longitude |
-178.68 (± 92.8
km)
|
Depth |
586 km (± 70 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
22 |
Used Station Count |
18 |
Standard Error |
0.73 (s) |
Azimuthal Gap |
351.06 (degrees) |
Minimum Distance |
16.20 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.3 |
|
mB |
4.9 (± 0.8) |
3 |
Mw(mB) |
4.3 (± 0.8) |
3 |
M |
4.3 |
3 |
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).