Download Event Information
Origin
PublicID |
2018p691168 |
UTC Time |
2018-09-13T17:34:10Z |
Latitude |
-34.85 (± 5.4
km)
|
Longitude |
-178.92 (± 10.2
km)
|
Depth |
102 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
65 |
Used Station Count |
45 |
Standard Error |
1.55 (s) |
Azimuthal Gap |
200.81 (degrees) |
Minimum Distance |
3.86 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.9 |
|
ML |
5.7 (± 0.1) |
7 |
MLv |
5.3 (± 0.1) |
32 |
mB |
5.4 (± 0.1) |
17 |
Mw(mB) |
4.8 (± 0.4) |
17 |
M |
4.9 |
32 |
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).