Download Event Information
Origin
PublicID |
2021p258191 |
UTC Time |
2021-04-06T12:39:37Z |
Latitude |
-29.59 (± 7.7
km)
|
Longitude |
-173.57 (± 17.8
km)
|
Depth |
0 km (± 0 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
12 |
Used Station Count |
11 |
Standard Error |
2.25 (s) |
Azimuthal Gap |
300.01 (degrees) |
Minimum Distance |
3.81 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.6 |
|
ML |
6.4 (± 0.1) |
2 |
MLv |
6.4 (± 0.1) |
2 |
mB |
4.6 |
1 |
Mw(mB) |
3.8 (± 0.4) |
1 |
M |
6.4 |
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).