PublicID | 2020p222608 |
UTC Time | 2020-03-23T08:44:06Z |
Latitude | -25.69 (± 15.0 km) |
Longitude | -179.09 (± 34.2 km) |
Depth | 544 km (± 26 km) |
Depth Type | free |
Earth Model | iasp91 |
Used Phase Count | 22 |
Used Station Count | 20 |
Standard Error | 28.80 (s) |
Azimuthal Gap | 312.20 (degrees) |
Minimum Distance | 3.69 (degrees) |
Type | Magnitude | Station Count |
Preferred (MLv) | 5.6 (± 0.2) | |
MLv | 5.6 (± 0.2) | 3 |
mB | 4.9 (± 0.2) | 7 |
Mw(mB) | 4.2 (± 0.4) | 7 |
M | 4.9 | 7 |
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.