Download Event Information
Origin
PublicID |
2017p458928 |
UTC Time |
2017-06-19T19:17:19Z |
Latitude |
-39.43 (± 5.1
km)
|
Longitude |
175.60 (± 7.7
km)
|
Depth |
20 km (± 6 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
12 |
Used Station Count |
8 |
Standard Error |
0.22 (s) |
Azimuthal Gap |
277.48 (degrees) |
Minimum Distance |
0.10 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
0.9 |
|
MLv |
0.9 (± 0.3) |
4 |
ML |
0.9 (± 0.2) |
7 |
M |
0.9 |
4 |
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).