Download Event Information
Origin
PublicID |
2017p016838 |
UTC Time |
2017-01-07T05:31:29Z |
Latitude |
-37.04 (± 10.6
km)
|
Longitude |
178.97 (± 12.6
km)
|
Depth |
3 km (± 9 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
26 |
Used Station Count |
19 |
Standard Error |
0.79 (s) |
Azimuthal Gap |
311.60 (degrees) |
Minimum Distance |
0.75 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.9 |
|
MLv |
3.9 (± 0.2) |
15 |
ML |
4.3 (± 0.2) |
15 |
M |
3.9 |
15 |
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).