At 12.02 a.m., on Monday 14 November 2016 NZDT, a magnitude 7.8 earthquake struck 15 km north-east of Culverden, North Canterbury, starting near the town of Waiau.
| PublicID | 2016p858000 |
| UTC Time | 2016-11-13T11:02:56Z |
| Latitude | -42.69 (± 2.3 km) |
| Longitude | 173.02 (± 3.4 km) |
| Depth | 15 km (± 4 km) |
| Depth Type | free |
| Earth Model | iasp91 |
| Used Phase Count | 94 |
| Used Station Count | 93 |
| Standard Error | 1.82 (s) |
| Azimuthal Gap | 54.99 (degrees) |
| Minimum Distance | 0.22 (degrees) |
| Type | Magnitude | Station Count |
| Preferred (Mw(mB)) | 7.8 (± 0.4) | |
| MLv | 7.4 (± 0.2) | 58 |
| ML | 7.8 (± 0.3) | 57 |
| mB | 7.7 (± 0.2) | 18 |
| Mw(mB) | 7.8 (± 0.4) | 37 |
| M | 7.8 | 58 |
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.