Download Event Information
Origin
PublicID |
2017p298898 |
UTC Time |
2017-04-21T14:13:19Z |
Latitude |
-39.71 (± 9.8
km)
|
Longitude |
176.95 (± 15.7
km)
|
Depth |
36 km (± 14 km) |
Depth Type |
free |
Earth Model |
nz3drx |
Used Phase Count |
12 |
Used Station Count |
12 |
Standard Error |
0.47 (s) |
Azimuthal Gap |
130.60 (degrees) |
Minimum Distance |
0.10 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
1.7 |
|
ML |
2.0 (± 0.2) |
8 |
MLv |
1.7 (± 0.3) |
7 |
M |
1.7 |
7 |
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).