Download Event Information
Origin
PublicID |
2021p809673 |
UTC Time |
2021-10-27T13:51:56Z |
Latitude |
-27.45 (± 82.2
km)
|
Longitude |
-178.96 (± 99.5
km)
|
Depth |
362 km (± 42 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
15 |
Used Station Count |
15 |
Standard Error |
0.74 (s) |
Azimuthal Gap |
313.58 (degrees) |
Minimum Distance |
2.03 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.4 (± 0.3) |
|
mB |
4.4 (± 0.3) |
4 |
Mw(mB) |
3.5 (± 0.4) |
4 |
MLv |
3.8 |
1 |
M |
3.8 |
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).