Phase one of our updated website is now live. Explore GeoNet beta and let us know what you think. Read this news article to find out what's happening.
| PublicID | 2019p381628 |
| UTC Time | 2019-05-22T04:51:40Z |
| Latitude | -39.44 (± 14.5 km) |
| Longitude | 175.70 (± 6.5 km) |
| Depth | 15 km (± 10 km) |
| Depth Type | free |
| Earth Model | iasp91 |
| Used Phase Count | 10 |
| Used Station Count | 7 |
| Standard Error | 0.08 (s) |
| Azimuthal Gap | 273.75 (degrees) |
| Minimum Distance | 0.05 (degrees) |
| Type | Magnitude | Station Count |
| Preferred (M) | 0.2 | |
| ML | 1.0 (± 0.5) | 7 |
| MLv | 0.2 (± 0.2) | 4 |
| M | 0.2 | 4 |
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.