Download Event Information
Origin
PublicID |
2017p536196 |
UTC Time |
2017-07-18T09:25:44Z |
Latitude |
-42.19 (± 2.8
km)
|
Longitude |
173.58 (± 4.1
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
21 |
Used Station Count |
18 |
Standard Error |
0.45 (s) |
Azimuthal Gap |
110.87 (degrees) |
Minimum Distance |
0.23 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.1 |
|
MLv |
3.1 (± 0.2) |
30 |
ML |
3.3 (± 0.2) |
12 |
M |
3.1 |
30 |
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).