Mulgor Logo EQ at Christchurch at 23:49:17 on 18-Dec-2018

Vertical Velocities recorded at Port Levy

EQ Details

Magnitude: 3.1
Depth: 5 km
Distance: 19 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 23.92 0.255 100.0
T < 1 s 21.85 0.247 98.9
T > 1 s 2.67 2.1 1.1

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.