Download Event Information
Origin
PublicID |
2019p215519 |
UTC Time |
2019-03-21T17:47:36Z |
Latitude |
-31.06 (± 3.2
km)
|
Longitude |
-177.30 (± 17.9
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
tab |
Used Phase Count |
24 |
Used Station Count |
20 |
Standard Error |
1.50 (s) |
Azimuthal Gap |
221.99 (degrees) |
Minimum Distance |
1.87 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
5.4 (± 0.1) |
|
MLv |
5.6 (± 0.2) |
11 |
ML |
6.0 (± 0.5) |
12 |
mB |
5.4 (± 0.1) |
8 |
Mw(mB) |
4.9 (± 0.4) |
8 |
M |
5.2 |
11 |
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).