Download Event Information
Origin
PublicID |
2020p562875 |
UTC Time |
2020-07-27T06:17:42Z |
Latitude |
-24.23 (± 17.3
km)
|
Longitude |
-179.62 (± 40.4
km)
|
Depth |
643 km (± 23 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
14 |
Used Station Count |
12 |
Standard Error |
0.64 (s) |
Azimuthal Gap |
316.82 (degrees) |
Minimum Distance |
5.24 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.5 |
|
mB |
4.4 (± 0.2) |
4 |
Mw(mB) |
3.5 (± 0.4) |
4 |
M |
3.5 |
4 |
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).