Download Event Information
Origin
PublicID |
2020p227894 |
UTC Time |
2020-03-25T07:37:52Z |
Latitude |
-19.51 (± 25.8
km)
|
Longitude |
-174.69 (± 92.2
km)
|
Depth |
33 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
11 |
Used Station Count |
10 |
Standard Error |
1.54 (s) |
Azimuthal Gap |
347.94 (degrees) |
Minimum Distance |
10.14 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.0 |
|
mB |
4.7 (± 0.2) |
4 |
Mw(mB) |
4.0 (± 0.4) |
4 |
M |
4.0 |
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).