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Origin
PublicID |
2014p571886 |
UTC Time |
2014-07-31T14:19:57Z |
Latitude |
-31.24 (± 4.6
km)
|
Longitude |
-179.93 (± 9.8
km)
|
Depth |
338 km (± 10 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
26 |
Used Station Count |
21 |
Standard Error |
1.23 (s) |
Azimuthal Gap |
169.82 (degrees) |
Minimum Distance |
2.63 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.9 |
|
MLv |
4.3 (± 0.2) |
17 |
mB |
4.1 (± 0.2) |
6 |
Mw(mB) |
3.2 (± 0.4) |
6 |
M |
3.9 |
17 |
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).