Download Event Information
Origin
PublicID |
2021p265006 |
UTC Time |
2021-04-09T01:15:16Z |
Latitude |
-40.46 (± 4.6
km)
|
Longitude |
173.34 (± 5.0
km)
|
Depth |
131 km (± 9 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
28 |
Used Station Count |
17 |
Standard Error |
0.46 (s) |
Azimuthal Gap |
139.85 (degrees) |
Minimum Distance |
0.56 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.6 |
|
MLv |
2.6 (± 0.2) |
18 |
M |
2.6 |
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).