PublicID | 2023p700240 |
UTC Time | 2023-09-17T02:08:22Z |
Latitude | -41.62 (± 4.1 km) |
Longitude | 174.42 (± 3.5 km) |
Depth | 12 km (± 0 km) |
Depth Type | operator assigned |
Earth Model | iasp91 |
Used Phase Count | 16 |
Used Station Count | 12 |
Standard Error | 0.35 (s) |
Azimuthal Gap | 133.06 (degrees) |
Minimum Distance | 0.26 (degrees) |
Type | Magnitude | Station Count |
Preferred (MLv) | 2.1 (± 0.3) | |
ML | 2.1 (± 0.2) | 8 |
MLv | 2.1 (± 0.3) | 5 |
M | 2.1 | 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.