Download Event Information
Origin
PublicID |
2017p616992 |
UTC Time |
2017-08-17T06:54:14Z |
Latitude |
-39.14 (± 5.8
km)
|
Longitude |
175.60 (± 7.7
km)
|
Depth |
85 km (± 11 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
50 |
Used Station Count |
50 |
Standard Error |
0.95 (s) |
Azimuthal Gap |
60.90 (degrees) |
Minimum Distance |
0.01 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.1 |
|
MLv |
2.1 (± 0.5) |
18 |
M |
2.1 |
18 |
ML |
2.3 (± 0.5) |
31 |
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).