Download Event Information
Origin
PublicID |
2015p171655 |
UTC Time |
2015-03-05T12:18:22Z |
Latitude |
-36.67 (± 3.9
km)
|
Longitude |
177.14 (± 2.6
km)
|
Depth |
12 km (± 0 km) |
Depth Type |
operator assigned |
Earth Model |
iasp91 |
Used Phase Count |
76 |
Used Station Count |
61 |
Standard Error |
1.43 (s) |
Azimuthal Gap |
207.07 (degrees) |
Minimum Distance |
0.86 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
4.2 |
|
MLv |
4.2 (± 0.2) |
47 |
ML |
4.4 (± 0.2) |
45 |
M |
4.2 |
47 |
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).