PublicID | 2021p447336 |
UTC Time | 2021-06-15T12:19:48Z |
Latitude | -32.47 (± 7.7 km) |
Longitude | -179.32 (± 20.2 km) |
Depth | 270 km (± 18 km) |
Depth Type | free |
Earth Model | iasp91 |
Used Phase Count | 22 |
Used Station Count | 14 |
Standard Error | 1.09 (s) |
Azimuthal Gap | 176.81 (degrees) |
Minimum Distance | 3.42 (degrees) |
Type | Magnitude | Station Count |
Preferred (mB) | 4.9 (± 0.2) | |
ML | 4.5 (± 0.1) | 8 |
MLv | 4.9 (± 0.2) | 10 |
mB | 4.9 (± 0.2) | 7 |
Mw(mB) | 4.2 (± 0.4) | 7 |
M | 4.6 | 10 |
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.