Download Event Information
Origin
PublicID |
2012p505798 |
UTC Time |
2012-07-06T03:29:29Z |
Latitude |
-43.60 (± 0.8
km)
|
Longitude |
172.34 (± 0.8
km)
|
Depth |
10 km (± 1 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
40 |
Used Station Count |
31 |
Standard Error |
0.44 (s) |
Azimuthal Gap |
96.21 (degrees) |
Minimum Distance |
0.11 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.9 |
|
MLv |
4.9 (± 0.2) |
12 |
ML |
5.1 (± 0.1) |
12 |
M |
4.9 |
12 |
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).