Download Event Information
Origin
PublicID |
2017p058092 |
UTC Time |
2017-01-22T11:51:37Z |
Latitude |
-41.68 (± 4.4
km)
|
Longitude |
174.27 (± 6.7
km)
|
Depth |
5 km (± 7 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
11 |
Used Station Count |
11 |
Standard Error |
0.48 (s) |
Azimuthal Gap |
129.67 (degrees) |
Minimum Distance |
0.08 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.9 |
|
ML |
2.0 (± 0.4) |
5 |
MLv |
1.9 (± 0.5) |
2 |
M |
1.9 |
2 |
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).