Download Event Information
Origin
PublicID |
2015p499270 |
UTC Time |
2015-07-04T17:31:11Z |
Latitude |
-37.78 (± 45.3
km)
|
Longitude |
178.28 (± 19.3
km)
|
Depth |
6 km (± 23 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
17 |
Used Station Count |
17 |
Standard Error |
1.70 (s) |
Azimuthal Gap |
273.21 (degrees) |
Minimum Distance |
0.18 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.4 |
|
MLv |
3.4 (± 0.3) |
12 |
M |
3.4 |
12 |
ML |
3.7 (± 0.3) |
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).