Download Event Information
Origin
PublicID |
2019p541612 |
UTC Time |
2019-07-20T09:31:23Z |
Latitude |
-38.38 (± 10.8
km)
|
Longitude |
175.45 (± 16.1
km)
|
Depth |
166 km (± 15 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
29 |
Used Station Count |
21 |
Standard Error |
0.73 (s) |
Azimuthal Gap |
251.76 (degrees) |
Minimum Distance |
0.88 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
2.3 |
|
ML |
2.8 (± 0.3) |
11 |
MLv |
2.3 (± 0.3) |
9 |
M |
2.3 |
9 |
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).