At 4.37 a.m., on the 2 September 2016, a magnitude 7.1 earthquake struck off the northern East Coast of North Island, 125 north-east of Te Araroa.
| PublicID | 2016p661332 |
| UTC Time | 2016-09-01T16:37:55Z |
| Latitude | -36.98 (± 7.6 km) |
| Longitude | 179.52 (± 12.6 km) |
| Depth | 22 km (± 19 km) |
| Depth Type | free |
| Earth Model | iasp91 |
| Used Phase Count | 87 |
| Used Station Count | 71 |
| Standard Error | 0.72 (s) |
| Azimuthal Gap | 288.57 (degrees) |
| Minimum Distance | 1.13 (degrees) |
| Type | Magnitude | Station Count |
| Preferred (M) | 7.1 | |
| MLv | 7.1 (± 0.2) | 22 |
| ML | 7.1 (± 0.2) | 8 |
| M | 7.1 | 22 |
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.