Download Event Information
Origin
PublicID |
2017p002231 |
UTC Time |
2017-01-01T19:48:55Z |
Latitude |
-38.96 (± 2.3
km)
|
Longitude |
174.69 (± 2.8
km)
|
Depth |
25 km (± 4 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
62 |
Used Station Count |
49 |
Standard Error |
0.44 (s) |
Azimuthal Gap |
120.64 (degrees) |
Minimum Distance |
0.18 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.4 |
|
MLv |
3.4 (± 0.4) |
95 |
ML |
3.8 (± 0.2) |
34 |
M |
3.4 |
95 |
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).