Download Event Information
Origin
PublicID |
2018p050136 |
UTC Time |
2018-01-19T13:11:28Z |
Latitude |
-32.68 (± 8.2
km)
|
Longitude |
178.79 (± 17.7
km)
|
Depth |
212 km (± 21 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
68 |
Used Station Count |
35 |
Standard Error |
2.92 (s) |
Azimuthal Gap |
190.58 (degrees) |
Minimum Distance |
4.42 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.8 |
|
ML |
4.9 (± 0.2) |
16 |
MLv |
4.5 (± 0.2) |
16 |
mB |
4.3 (± 0.1) |
11 |
Mw(mB) |
3.4 (± 0.4) |
11 |
M |
3.8 |
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).