Download Event Information
Origin
PublicID |
2019p304278 |
UTC Time |
2019-04-23T13:56:55Z |
Latitude |
-23.77 (± 9.2
km)
|
Longitude |
-179.03 (± 24.9
km)
|
Depth |
577 km (± 14 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
25 |
Used Station Count |
20 |
Standard Error |
1.19 (s) |
Azimuthal Gap |
188.57 (degrees) |
Minimum Distance |
5.56 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.3 (± 0.2) |
|
mB |
4.3 (± 0.2) |
17 |
Mw(mB) |
3.3 (± 0.4) |
21 |
MLv |
5.1 |
1 |
M |
3.7 |
21 |
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).