PublicID | 2017p469575 |
UTC Time | 2017-06-23T17:49:39Z |
Latitude | -41.17 (± 3.4 km) |
Longitude | 174.60 (± 3.7 km) |
Depth | 39 km (± 6 km) |
Depth Type | free |
Earth Model | nz3drx |
Used Phase Count | 22 |
Used Station Count | 14 |
Standard Error | 0.39 (s) |
Azimuthal Gap | 92.92 (degrees) |
Minimum Distance | 0.17 (degrees) |
Type | Magnitude | Station Count |
Preferred (M) | 3.8 | |
MLv | 3.8 (± 0.2) | 12 |
ML | 4.1 (± 0.2) | 12 |
M | 3.8 | 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.