Download Event Information
Origin
PublicID |
2018p377381 |
UTC Time |
2018-05-20T15:09:08Z |
Latitude |
-39.36 (± 22.8
km)
|
Longitude |
175.35 (± 32.3
km)
|
Depth |
101 km (± 44 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
12 |
Used Station Count |
12 |
Standard Error |
1.12 (s) |
Azimuthal Gap |
119.96 (degrees) |
Minimum Distance |
0.19 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.4 |
|
MLv |
2.4 (± 0.7) |
7 |
M |
2.4 |
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).