Download Event Information
Origin
PublicID |
2015p746544 |
UTC Time |
2015-10-04T05:18:05Z |
Latitude |
-33.52 (± 27.4
km)
|
Longitude |
-178.40 (± 30.2
km)
|
Depth |
184 km (± 44 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
35 |
Used Station Count |
26 |
Standard Error |
1.27 (s) |
Azimuthal Gap |
344.73 (degrees) |
Minimum Distance |
4.85 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.2 |
|
MLv |
4.5 (± 0.1) |
13 |
ML |
4.8 (± 0.2) |
19 |
mB |
4.6 (± 0.1) |
7 |
Mw(mB) |
3.8 (± 0.4) |
7 |
M |
4.2 |
13 |
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).