Download Event Information
Origin
PublicID |
2017p325279 |
UTC Time |
2017-05-01T08:28:41Z |
Latitude |
-37.02 (± 4.9
km)
|
Longitude |
177.68 (± 5.0
km)
|
Depth |
113 km (± 6 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
93 |
Used Station Count |
85 |
Standard Error |
0.61 (s) |
Azimuthal Gap |
204.68 (degrees) |
Minimum Distance |
0.64 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.4 |
|
MLv |
4.4 (± 0.2) |
65 |
ML |
4.5 (± 0.3) |
55 |
M |
4.4 |
65 |
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).