Mulgor Logo 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

Statistics of Signal at Port Levy
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.