Download Event Information
Origin
PublicID |
2018p542383 |
UTC Time |
2018-07-20T16:21:50Z |
Latitude |
-38.32 (± 3.3
km)
|
Longitude |
176.35 (± 2.9
km)
|
Depth |
6 km (± 8 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
17 |
Used Station Count |
13 |
Standard Error |
0.25 (s) |
Azimuthal Gap |
53.69 (degrees) |
Minimum Distance |
0.07 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.6 |
|
MLv |
1.6 (± 0.3) |
11 |
ML |
2.0 (± 0.2) |
11 |
M |
1.6 |
11 |
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).