Download Event Information
Origin
PublicID |
2018p220761 |
UTC Time |
2018-03-23T16:21:46Z |
Latitude |
-37.62 (± 28.2
km)
|
Longitude |
178.11 (± 18.0
km)
|
Depth |
26 km (± 22 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
14 |
Used Station Count |
14 |
Standard Error |
0.73 (s) |
Azimuthal Gap |
207.99 (degrees) |
Minimum Distance |
0.25 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.2 |
|
MLv |
2.2 (± 0.3) |
7 |
M |
2.2 |
7 |
ML |
2.2 (± 0.3) |
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).