EQ at Christchurch at 09:47:24 on 31-May-2021
Vertical Velocities recorded at Port Levy
EQ Details
Magnitude: 4.2
Depth: 9 km
Distance: 23 km
Estimated travel time of P waves: 4 s
Estimated travel time of S waves: 7 s
Travel times of P and S waves were derived from this website
| Sig. Height μm/s | Sig. Period s | % of Variance | |
|---|---|---|---|
| Raw | 346.92 | 0.305 | 100.0 |
| T < 1 s | 349.66 | 0.291 | 99.6 |
| T > 1 s | 22.98 | 2.1 | 0.5 |
Significant height and period are derived from a zero-crossing analysis of the wave signal after the arrival time of the p waves.
They are the averages of the highest third of the waves.