PublicID | 2020p690973 |
UTC Time | 2020-09-12T15:49:42Z |
Latitude | -33.09 (± 8.6 km) |
Longitude | -178.06 (± 23.2 km) |
Depth | 12 km (± 0 km) |
Depth Type | operator assigned |
Earth Model | iasp91 |
Used Phase Count | 28 |
Used Station Count | 20 |
Standard Error | 1.78 (s) |
Azimuthal Gap | 205.37 (degrees) |
Minimum Distance | 3.81 (degrees) |
Type | Magnitude | Station Count |
Preferred (mB) | 4.8 (± 0.1) | |
ML | 4.9 (± 0.2) | 13 |
MLv | 4.9 (± 0.1) | 12 |
mB | 4.8 (± 0.1) | 7 |
Mw(mB) | 4.1 (± 0.4) | 7 |
M | 4.5 | 12 |
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.