Download Event Information
Origin
PublicID |
2021p341035 |
UTC Time |
2021-05-07T04:23:48Z |
Latitude |
-37.95 (± 6.6
km)
|
Longitude |
176.48 (± 7.5
km)
|
Depth |
130 km (± 13 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
20 |
Used Station Count |
13 |
Standard Error |
0.58 (s) |
Azimuthal Gap |
131.43 (degrees) |
Minimum Distance |
0.77 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
2.3 (± 0.1) |
|
MLv |
2.3 (± 0.1) |
6 |
ML |
2.1 (± 0.2) |
9 |
M |
2.3 |
6 |
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).