Download Event Information
Origin
PublicID |
2017p982072 |
UTC Time |
2017-12-30T08:48:11Z |
Latitude |
-38.65 (± 1.6
km)
|
Longitude |
176.09 (± 2.3
km)
|
Depth |
9 km (± 2 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
22 |
Used Station Count |
18 |
Standard Error |
0.62 (s) |
Azimuthal Gap |
72.23 (degrees) |
Minimum Distance |
0.03 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.0 |
|
MLv |
2.0 (± 0.3) |
12 |
ML |
2.2 (± 0.4) |
14 |
M |
2.0 |
12 |
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).