Download Event Information
Origin
PublicID |
2021p552795 |
UTC Time |
2021-07-24T12:49:19Z |
Latitude |
-38.83 (± 6.6
km)
|
Longitude |
175.95 (± 6.3
km)
|
Depth |
94 km (± 10 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
28 |
Used Station Count |
25 |
Standard Error |
0.35 (s) |
Azimuthal Gap |
51.19 (degrees) |
Minimum Distance |
0.13 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.2 |
|
MLv |
3.2 (± 0.3) |
91 |
ML |
2.6 (± 0.3) |
18 |
M |
3.2 |
91 |
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).