Download Event Information
Origin
PublicID |
1566122 |
UTC Time |
1984-12-30T21:36:54Z |
Latitude |
-36.59 (± 0.1
km)
|
Longitude |
177.55 (± 0.1
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
nz1d |
Used Phase Count |
12 |
Used Station Count |
9 |
Standard Error |
0.80 (s) |
Azimuthal Gap |
207.00 (degrees) |
Minimum Distance |
1.37 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (Mw) |
6.7 |
|
ML |
6.3 (± 0.3) |
10 |
MS |
6.8 |
0 |
Mw |
6.7 |
0 |
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).