Download Event Information
Origin
PublicID |
2017p648458 |
UTC Time |
2017-08-28T22:18:44Z |
Latitude |
-37.54 (± 50.1
km)
|
Longitude |
178.25 (± 38.8
km)
|
Depth |
7 km (± 31 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
18 |
Used Station Count |
18 |
Standard Error |
2.85 (s) |
Azimuthal Gap |
285.42 (degrees) |
Minimum Distance |
0.30 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.1 |
|
MLv |
3.1 (± 0.2) |
14 |
M |
3.1 |
14 |
ML |
3.4 (± 0.3) |
14 |
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).