Download Event Information
Origin
PublicID |
2019p701798 |
UTC Time |
2019-09-17T15:57:25Z |
Latitude |
-33.21 (± 5.7
km)
|
Longitude |
177.97 (± 21.3
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
35 |
Used Station Count |
20 |
Standard Error |
1.14 (s) |
Azimuthal Gap |
343.40 (degrees) |
Minimum Distance |
4.35 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.7 (± 0.3) |
|
mB |
4.7 (± 0.3) |
6 |
Mw(mB) |
4.0 (± 0.4) |
6 |
ML |
4.2 (± 0.1) |
16 |
MLv |
3.9 (± 0.1) |
8 |
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).