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Origin
PublicID |
2020p491615 |
UTC Time |
2020-06-30T21:32:33Z |
Latitude |
-35.11 (± 11.2
km)
|
Longitude |
178.94 (± 13.9
km)
|
Depth |
208 km (± 17 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
34 |
Used Station Count |
18 |
Standard Error |
0.65 (s) |
Azimuthal Gap |
301.61 (degrees) |
Minimum Distance |
2.50 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.9 |
|
ML |
3.8 (± 0.3) |
12 |
MLv |
3.9 (± 0.2) |
9 |
M |
3.9 |
9 |
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).