Download Event Information
Origin
PublicID |
2015p706760 |
UTC Time |
2015-09-19T12:02:10Z |
Latitude |
-42.28 (± 3.4
km)
|
Longitude |
172.53 (± 4.0
km)
|
Depth |
16 km (± 7 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
35 |
Used Station Count |
25 |
Standard Error |
0.69 (s) |
Azimuthal Gap |
73.70 (degrees) |
Minimum Distance |
0.33 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.3 |
|
MLv |
4.3 (± 0.4) |
107 |
ML |
4.1 (± 0.2) |
18 |
M |
4.3 |
107 |
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).