Download Event Information
Origin
PublicID |
2020p609093 |
UTC Time |
2020-08-13T08:43:17Z |
Latitude |
-31.39 (± 7.7
km)
|
Longitude |
-178.97 (± 18.3
km)
|
Depth |
295 km (± 13 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
30 |
Used Station Count |
24 |
Standard Error |
1.28 (s) |
Azimuthal Gap |
173.96 (degrees) |
Minimum Distance |
2.31 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.9 |
|
ML |
5.0 (± 0.2) |
15 |
MLv |
5.4 (± 0.2) |
18 |
mB |
5.2 (± 0.1) |
13 |
Mw(mB) |
4.6 (± 0.4) |
13 |
M |
4.9 |
18 |
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).