Mulgor Logo EQ at Christchurch at 04:31:26 on 20-Sep-2019

Vertical Velocities recorded at Port Levy

EQ Details

Magnitude: 3.1
Depth: 7 km
Distance: 18 km
Estimated travel time of P waves: 3 s
Estimated travel time of S waves: 6 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 28.97 0.218 100.0
T < 1 s 27.56 0.221 99.9
T > 1 s 1.08 1.6 0.1

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.