Download Event Information
Origin
PublicID |
2018p868282 |
UTC Time |
2018-11-18T06:19:09Z |
Latitude |
-30.54 (± 7.2
km)
|
Longitude |
-177.31 (± 16.0
km)
|
Depth |
288 km (± 8 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
103 |
Used Station Count |
93 |
Standard Error |
1.67 (s) |
Azimuthal Gap |
226.07 (degrees) |
Minimum Distance |
1.38 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.8 |
|
MLv |
5.6 (± 0.4) |
10 |
ML |
5.7 (± 0.2) |
7 |
mB |
5.3 (± 0.2) |
53 |
Mw(mB) |
4.7 (± 0.4) |
53 |
M |
4.8 |
53 |
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).