Download Event Information
Origin
PublicID |
2022p075896 |
UTC Time |
2022-01-29T01:57:34Z |
Latitude |
-39.21 (± 3.8
km)
|
Longitude |
177.32 (± 4.0
km)
|
Depth |
22 km (± 8 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
19 |
Used Station Count |
14 |
Standard Error |
0.29 (s) |
Azimuthal Gap |
118.93 (degrees) |
Minimum Distance |
0.14 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.9 |
|
MLv |
1.9 (± 0.1) |
7 |
ML |
1.9 (± 0.1) |
11 |
M |
1.9 |
7 |
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).