Download Event Information
Origin
PublicID |
2018p308789 |
UTC Time |
2018-04-25T06:03:23Z |
Latitude |
-38.37 (± 10.2
km)
|
Longitude |
176.53 (± 15.9
km)
|
Depth |
128 km (± 19 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
55 |
Used Station Count |
55 |
Standard Error |
1.70 (s) |
Azimuthal Gap |
146.21 (degrees) |
Minimum Distance |
0.21 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.3 |
|
MLv |
2.3 (± 0.3) |
36 |
M |
2.3 |
36 |
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).