Download Event Information
Origin
PublicID |
2020p124190 |
UTC Time |
2020-02-15T22:47:52Z |
Latitude |
-33.63 (± 15.8
km)
|
Longitude |
-179.22 (± 20.5
km)
|
Depth |
189 km (± 45 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
33 |
Used Station Count |
21 |
Standard Error |
1.01 (s) |
Azimuthal Gap |
317.89 (degrees) |
Minimum Distance |
4.42 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.0 |
|
MLv |
4.2 (± 0.1) |
12 |
ML |
3.9 (± 0.1) |
13 |
mB |
4.6 (± 0.2) |
8 |
Mw(mB) |
3.8 (± 0.4) |
8 |
M |
4.0 |
12 |
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).