Download Event Information
Origin
PublicID |
2018p104920 |
UTC Time |
2018-02-08T19:41:22Z |
Latitude |
-35.65 (± 11.1
km)
|
Longitude |
178.03 (± 11.3
km)
|
Depth |
252 km (± 14 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
37 |
Used Station Count |
21 |
Standard Error |
0.75 (s) |
Azimuthal Gap |
268.40 (degrees) |
Minimum Distance |
1.92 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.5 |
|
MLv |
3.5 (± 0.2) |
9 |
ML |
3.7 (± 0.2) |
15 |
M |
3.5 |
9 |
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).