Download Event Information
Origin
PublicID |
2020p377973 |
UTC Time |
2020-05-19T20:21:19Z |
Latitude |
-31.88 (± 16.9
km)
|
Longitude |
179.61 (± 24.5
km)
|
Depth |
496 km (± 54 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
23 |
Used Station Count |
17 |
Standard Error |
0.84 (s) |
Azimuthal Gap |
315.00 (degrees) |
Minimum Distance |
5.96 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.4 (± 0.1) |
|
MLv |
4.5 (± 0.4) |
7 |
mB |
4.4 (± 0.1) |
5 |
Mw(mB) |
3.5 (± 0.4) |
5 |
M |
4.2 |
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).