Download Event Information
Origin
PublicID |
2020p788338 |
UTC Time |
2020-10-18T16:24:10Z |
Latitude |
-24.11 (± 5.7
km)
|
Longitude |
-179.68 (± 9.7
km)
|
Depth |
508 km (± 12 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
26 |
Used Station Count |
20 |
Standard Error |
2.16 (s) |
Azimuthal Gap |
142.08 (degrees) |
Minimum Distance |
5.37 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.7 (± 0.9) |
|
MLv |
5.0 (± 0.3) |
2 |
mB |
4.7 (± 0.9) |
2 |
Mw(mB) |
4.0 (± 0.9) |
2 |
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).