| PublicID | 2023p318705 |
| UTC Time | 2023-04-28T22:05:54Z |
| Latitude | -33.80 (± 40.5 km) |
| Longitude | -178.35 (± 53.8 km) |
| Depth | 300 km (± 0 km) |
| Depth Type | operator assigned |
| Earth Model | iasp91 |
| Used Phase Count | 12 |
| Used Station Count | 8 |
| Standard Error | 0.89 (s) |
| Azimuthal Gap | 351.53 (degrees) |
| Minimum Distance | 5.05 (degrees) |
| Type | Magnitude | Station Count |
| Preferred (MLv) | 4.0 (± 0.1) | |
| mB | 4.1 (± 0.2) | 2 |
| Mw(mB) | 3.2 (± 0.4) | 2 |
| ML | 4.1 (± 0.2) | 3 |
| MLv | 4.0 (± 0.1) | 5 |
| M | 4.0 | 5 |
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.
