Download Event Information
Origin
PublicID |
3541638 |
UTC Time |
2011-07-06T19:03:18Z |
Latitude |
-29.54 (± 0.0
km)
|
Longitude |
-176.34 (± 0.0
km)
|
Depth |
17 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
nz1dr |
Used Phase Count |
36 |
Used Station Count |
36 |
Standard Error |
0.17 (s) |
Azimuthal Gap |
307.00 (degrees) |
Minimum Distance |
9.16 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (Mw) |
7.6 |
|
Mw |
7.6 |
0 |
MS |
7.8 |
0 |
Mb |
7.0 |
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).