Mulgor Logo EQ at Christchurch at 09:10:28 on 15-Jul-2018

Vertical Velocities recorded at Port Levy

EQ Details

Magnitude: 4.0
Depth: 9 km
Distance: 20 km
Estimated travel time of P waves: 4 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 302.75 0.282 100.0
T < 1 s 310.17 0.284 99.9
T > 1 s 11.46 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.