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Origin
PublicID |
2019p214689 |
UTC Time |
2019-03-21T10:25:13Z |
Latitude |
-30.36 (± 20.0
km)
|
Longitude |
-178.38 (± 50.4
km)
|
Depth |
303 km (± 17 km) |
Depth Type |
free |
Earth Model |
tab |
Used Phase Count |
35 |
Used Station Count |
21 |
Standard Error |
1.73 (s) |
Azimuthal Gap |
178.70 (degrees) |
Minimum Distance |
1.16 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.7 (± 0.3) |
|
MLv |
4.6 (± 0.4) |
6 |
mB |
4.7 (± 0.3) |
4 |
Mw(mB) |
4.0 (± 0.4) |
4 |
M |
4.4 |
6 |
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).