Download Event Information
Origin
PublicID |
2018p720479 |
UTC Time |
2018-09-24T13:51:14Z |
Latitude |
-44.89 (± 3.8
km)
|
Longitude |
167.80 (± 4.7
km)
|
Depth |
64 km (± 8 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
24 |
Used Station Count |
13 |
Standard Error |
0.89 (s) |
Azimuthal Gap |
171.90 (degrees) |
Minimum Distance |
0.24 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.1 |
|
MLv |
4.1 (± 0.2) |
17 |
ML |
4.2 (± 0.2) |
11 |
M |
4.1 |
17 |
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).