Download Event Information
Origin
PublicID |
2021p570083 |
UTC Time |
2021-07-30T22:20:38Z |
Latitude |
-46.51 (± 8.2
km)
|
Longitude |
165.48 (± 7.5
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
18 |
Used Station Count |
11 |
Standard Error |
1.18 (s) |
Azimuthal Gap |
307.34 (degrees) |
Minimum Distance |
0.90 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.7 |
|
ML |
3.5 (± 0.3) |
9 |
MLv |
3.7 (± 0.7) |
2 |
M |
3.7 |
2 |
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).