Download Event Information
Origin
PublicID |
2019p520291 |
UTC Time |
2019-07-12T12:10:10Z |
Latitude |
-31.03 (± 11.8
km)
|
Longitude |
179.82 (± 23.2
km)
|
Depth |
490 km (± 42 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
32 |
Used Station Count |
24 |
Standard Error |
1.27 (s) |
Azimuthal Gap |
319.68 (degrees) |
Minimum Distance |
6.64 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.4 (± 0.1) |
|
MLv |
4.8 (± 0.1) |
12 |
ML |
4.8 (± 0.1) |
10 |
mB |
4.4 (± 0.1) |
14 |
Mw(mB) |
3.6 (± 0.4) |
14 |
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).