Mulgor Logo EQ at Christchurch at 22:55:53 on 04-Oct-2021

Vertical Velocities recorded at Port Levy

EQ Details

Magnitude: 2.1
Depth: 4 km
Distance: 4 km
Estimated travel time of P waves: 1 s
Estimated travel time of S waves: 2 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 30.18 0.140 100.0
T < 1 s 25.91 0.148 99.8
T > 1 s 1.40 2.5 0.2

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.