Download Event Information
Origin
PublicID |
2019p311256 |
UTC Time |
2019-04-26T03:54:12Z |
Latitude |
-22.89 (± 20.1
km)
|
Longitude |
-172.55 (± 35.6
km)
|
Depth |
250 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
37 |
Used Station Count |
21 |
Standard Error |
1.46 (s) |
Azimuthal Gap |
349.13 (degrees) |
Minimum Distance |
7.97 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.6 (± 0.2) |
|
MLv |
5.9 |
1 |
mB |
4.6 (± 0.2) |
7 |
Mw(mB) |
3.8 (± 0.4) |
7 |
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).