Download Event Information
Origin
PublicID |
2013p613988 |
UTC Time |
2013-08-16T04:12:47Z |
Latitude |
-41.71 (± 1.8
km)
|
Longitude |
174.18 (± 1.4
km)
|
Depth |
7 km (± 2 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
26 |
Used Station Count |
20 |
Standard Error |
0.34 (s) |
Azimuthal Gap |
68.01 (degrees) |
Minimum Distance |
0.05 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.7 |
|
MLv |
3.7 (± 0.3) |
22 |
ML |
4.1 (± 0.2) |
12 |
M |
3.7 |
22 |
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).