Download Event Information
Origin
PublicID |
2018p142532 |
UTC Time |
2018-02-22T17:41:30Z |
Latitude |
-38.95 (± 2.3
km)
|
Longitude |
176.48 (± 2.1
km)
|
Depth |
40 km (± 4 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
84 |
Used Station Count |
67 |
Standard Error |
0.46 (s) |
Azimuthal Gap |
32.25 (degrees) |
Minimum Distance |
0.13 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.3 |
|
MLv |
3.3 (± 0.2) |
51 |
ML |
3.6 (± 0.3) |
50 |
M |
3.3 |
51 |
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).