Download Event Information
Origin
PublicID |
2016p287557 |
UTC Time |
2016-04-16T09:30:26Z |
Latitude |
-39.56 (± 2.0
km)
|
Longitude |
176.98 (± 2.3
km)
|
Depth |
16 km (± 3 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
82 |
Used Station Count |
74 |
Standard Error |
0.60 (s) |
Azimuthal Gap |
82.65 (degrees) |
Minimum Distance |
0.12 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.4 |
|
MLv |
3.4 (± 0.2) |
56 |
ML |
3.7 (± 0.2) |
56 |
M |
3.4 |
56 |
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).