Download Event Information
Origin
PublicID |
2018p370015 |
UTC Time |
2018-05-17T21:43:15Z |
Latitude |
-32.48 (± 4.9
km)
|
Longitude |
-178.76 (± 13.2
km)
|
Depth |
238 km (± 15 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
42 |
Used Station Count |
36 |
Standard Error |
1.46 (s) |
Azimuthal Gap |
189.21 (degrees) |
Minimum Distance |
3.28 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (Mw(mB)) |
5.8 (± 0.4) |
|
MLv |
6.4 (± 0.2) |
21 |
ML |
6.5 (± 0.2) |
7 |
mB |
6.1 (± 0.2) |
19 |
Mw(mB) |
5.8 (± 0.4) |
19 |
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).