Download Event Information
Origin
PublicID |
2018p207164 |
UTC Time |
2018-03-18T15:36:33Z |
Latitude |
-32.75 (± 8.5
km)
|
Longitude |
-179.77 (± 19.5
km)
|
Depth |
193 km (± 14 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
59 |
Used Station Count |
35 |
Standard Error |
1.79 (s) |
Azimuthal Gap |
170.44 (degrees) |
Minimum Distance |
3.82 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.1 |
|
MLv |
4.4 (± 0.1) |
16 |
ML |
4.8 (± 0.3) |
18 |
mB |
4.5 (± 0.1) |
8 |
Mw(mB) |
3.7 (± 0.4) |
8 |
M |
4.1 |
16 |
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).