Download Event Information
Origin
PublicID |
2017p974394 |
UTC Time |
2017-12-27T12:34:01Z |
Latitude |
-25.93 (± 28.3
km)
|
Longitude |
-174.23 (± 33.0
km)
|
Depth |
206 km (± 11 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
31 |
Used Station Count |
25 |
Standard Error |
2.66 (s) |
Azimuthal Gap |
340.33 (degrees) |
Minimum Distance |
4.66 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
5.5 |
|
MLv |
5.6 |
1 |
mB |
4.6 (± 0.7) |
3 |
Mw(mB) |
3.8 (± 0.7) |
3 |
M |
5.5 |
3 |
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).