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Origin
PublicID |
2015p570004 |
UTC Time |
2015-07-30T21:39:13Z |
Latitude |
-37.88 (± 4.4
km)
|
Longitude |
177.40 (± 2.6
km)
|
Depth |
32 km (± 5 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
37 |
Used Station Count |
28 |
Standard Error |
0.65 (s) |
Azimuthal Gap |
151.78 (degrees) |
Minimum Distance |
0.24 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.9 |
|
MLv |
2.9 (± 0.2) |
22 |
ML |
3.2 (± 0.2) |
22 |
M |
2.9 |
22 |
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).