Download Event Information
Origin
PublicID |
2019p240896 |
UTC Time |
2019-03-31T03:07:31Z |
Latitude |
-30.74 (± 2.7
km)
|
Longitude |
-177.27 (± 12.1
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
24 |
Used Station Count |
16 |
Standard Error |
3.68 (s) |
Azimuthal Gap |
198.80 (degrees) |
Minimum Distance |
1.58 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.6 (± 0.1) |
|
MLv |
4.9 (± 0.1) |
3 |
ML |
5.3 (± 0.2) |
3 |
mB |
4.6 (± 0.1) |
4 |
Mw(mB) |
3.7 (± 0.4) |
4 |
M |
4.6 |
4 |
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).