Download Event Information
Origin
PublicID |
2017p139098 |
UTC Time |
2017-02-21T11:11:28Z |
Latitude |
-38.00 (± 40.8
km)
|
Longitude |
177.73 (± 35.4
km)
|
Depth |
17 km (± 44 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
11 |
Used Station Count |
11 |
Standard Error |
0.94 (s) |
Azimuthal Gap |
211.74 (degrees) |
Minimum Distance |
0.44 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.9 |
|
ML |
3.0 (± 0.3) |
9 |
MLv |
2.9 (± 0.4) |
4 |
M |
2.9 |
4 |
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).