Download Event Information
Origin
PublicID |
2020p539374 |
UTC Time |
2020-07-18T13:38:02Z |
Latitude |
-32.66 (± 5.0
km)
|
Longitude |
-179.38 (± 10.2
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
34 |
Used Station Count |
28 |
Standard Error |
1.48 (s) |
Azimuthal Gap |
149.04 (degrees) |
Minimum Distance |
3.61 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
5.7 (± 0.1) |
|
ML |
5.2 (± 0.4) |
21 |
MLv |
5.8 (± 0.4) |
20 |
mB |
5.7 (± 0.1) |
13 |
Mw(mB) |
5.2 (± 0.4) |
13 |
M |
5.4 |
20 |
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).