Download Event Information
Origin
PublicID |
2019p539492 |
UTC Time |
2019-07-19T14:40:54Z |
Latitude |
-36.75 (± 7.1
km)
|
Longitude |
-179.28 (± 5.9
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
50 |
Used Station Count |
27 |
Standard Error |
0.88 (s) |
Azimuthal Gap |
256.47 (degrees) |
Minimum Distance |
2.12 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.8 |
|
MLv |
3.8 (± 0.2) |
17 |
ML |
4.1 (± 0.3) |
21 |
M |
3.8 |
17 |
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).