PublicID | 2020p172270 |
UTC Time | 2020-03-04T17:44:25Z |
Latitude | -23.63 (± 8.8 km) |
Longitude | 179.80 (± 12.6 km) |
Depth | 670 km (± 0 km) |
Depth Type | operator assigned |
Earth Model | tab |
Used Phase Count | 24 |
Used Station Count | 16 |
Standard Error | 1.66 (s) |
Azimuthal Gap | 223.01 (degrees) |
Minimum Distance | 10.59 (degrees) |
Type | Magnitude | Station Count |
Preferred (mB) | 4.8 (± 0.2) | |
mB | 4.8 (± 0.2) | 5 |
Mw(mB) | 4.1 (± 0.4) | 5 |
M | 4.1 | 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.