Download Event Information
Origin
PublicID |
2019p304574 |
UTC Time |
2019-04-23T16:37:10Z |
Latitude |
-40.26 (± 2.0
km)
|
Longitude |
175.97 (± 2.2
km)
|
Depth |
25 km (± 3 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
46 |
Used Station Count |
28 |
Standard Error |
0.52 (s) |
Azimuthal Gap |
43.04 (degrees) |
Minimum Distance |
0.11 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.8 |
|
M |
4.8 |
98 |
MLv |
4.8 (± 0.2) |
98 |
ML |
5.3 (± 0.3) |
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).