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Origin
PublicID |
2015p507669 |
UTC Time |
2015-07-07T20:03:34Z |
Latitude |
-25.36 (± 19.4
km)
|
Longitude |
-174.45 (± 44.2
km)
|
Depth |
273 km (± 26 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
52 |
Used Station Count |
47 |
Standard Error |
1.59 (s) |
Azimuthal Gap |
352.68 (degrees) |
Minimum Distance |
13.64 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.5 |
|
mB |
5.2 (± 0.1) |
25 |
Mw(mB) |
4.5 (± 0.4) |
25 |
M |
4.5 |
25 |
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).