Download Event Information
Origin
PublicID |
2020p730156 |
UTC Time |
2020-09-27T03:47:23Z |
Latitude |
-39.19 (± 4.4
km)
|
Longitude |
174.91 (± 2.1
km)
|
Depth |
23 km (± 6 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
28 |
Used Station Count |
19 |
Standard Error |
0.22 (s) |
Azimuthal Gap |
61.38 (degrees) |
Minimum Distance |
0.14 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
5.2 |
|
M |
5.2 |
123 |
MLv |
5.2 (± 0.3) |
123 |
ML |
5.4 (± 0.3) |
13 |
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).