PublicID | 2012p049415 |
UTC Time | 2012-01-19T06:48:48Z |
Latitude | -46.98 (± 17.6 km) |
Longitude | 165.77 (± 9.3 km) |
Depth | 12 km (± 0 km) |
Depth Type | operator assigned |
Earth Model | nz3drx |
Used Phase Count | 92 |
Used Station Count | 85 |
Standard Error | 1.35 (s) |
Azimuthal Gap | 304.38 (degrees) |
Minimum Distance | 0.98 (degrees) |
Type | Magnitude | Station Count |
Preferred (M) | 5.7 | |
MLv | 6.4 (± 0.2) | 16 |
ML | 6.5 (± 0.2) | 16 |
mB | 6.0 (± 0.3) | 68 |
Mw(mB) | 5.6 (± 0.4) | 52 |
M | 5.7 | 52 |
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).
Map showing stations with picks used to locate the earthquake. Stations with picks that have a zero weight in the solution are shown as small grey circles. Those with a higher weight are shown as larger circles. The quake is shown by the largest circle.