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Origin
PublicID |
2019p570217 |
UTC Time |
2019-07-30T23:30:34Z |
Latitude |
-31.58 (± 6.1
km)
|
Longitude |
-179.12 (± 15.8
km)
|
Depth |
315 km (± 13 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
36 |
Used Station Count |
23 |
Standard Error |
1.55 (s) |
Azimuthal Gap |
173.00 (degrees) |
Minimum Distance |
2.53 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (mB) |
4.7 (± 0.2) |
|
MLv |
4.6 (± 0.2) |
10 |
ML |
4.8 (± 0.2) |
7 |
mB |
4.7 (± 0.2) |
9 |
Mw(mB) |
3.9 (± 0.4) |
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).