Download Event Information
Origin
PublicID |
2021p490499 |
UTC Time |
2021-07-01T11:38:05Z |
Latitude |
-38.50 (± 7.2
km)
|
Longitude |
175.82 (± 6.6
km)
|
Depth |
149 km (± 7 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
47 |
Used Station Count |
41 |
Standard Error |
0.38 (s) |
Azimuthal Gap |
38.37 (degrees) |
Minimum Distance |
0.01 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.8 |
|
ML |
2.6 (± 0.6) |
7 |
MLv |
2.8 (± 0.4) |
31 |
M |
2.8 |
31 |
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).