Download Event Information
Origin
PublicID |
2021p374153 |
UTC Time |
2021-05-19T10:28:47Z |
Latitude |
-43.46 (± 2.3
km)
|
Longitude |
172.09 (± 3.4
km)
|
Depth |
4 km (± 3 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
19 |
Used Station Count |
14 |
Standard Error |
0.34 (s) |
Azimuthal Gap |
56.53 (degrees) |
Minimum Distance |
0.03 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (MLv) |
1.5 (± 0.1) |
|
ML |
1.9 (± 0.4) |
8 |
MLv |
1.5 (± 0.1) |
3 |
M |
1.5 |
3 |
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).