LESSINES (BE)
Quarry blast10 January 2017
- Magnitude
- 1.5ML
- Depth
- 10.0km ± 12.7
- Belgian time
- 13:03:242017-01-10
- UTC
- 12:03:242017-01-10
Main parameters
| Date and time | 2017-01-10 12:03:24 UTC 2017-01-10 13:03:24 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.742° N, 3.661° E Uncertainty ± 10.3 km |
| Depth of hypocenter | 10.0 ± 12.7 km |
| Event ID | ROB 5612 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-01-10 13:54:31 Belgian time
Location map
- Epicentre
- Station that recorded the event
Arrival times at the stations
Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.
- Stations
- 8
- Epicentral distance
- 31.4 – 129.0km
- Mean velocity, P wave
- 6.2km/s
- P wave
- S wave
- Curve fitted to the measurements
Notes and method
Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Hypocenter at a depth of 10.0 km. P wave: 7 measurements, root-mean-square deviation 0.39 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
Station measurements
P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.
| km | ° | UTC | UTC | s | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)8 stations | ||||||
| SKQSteenkerque | 31.4 | 109 | 12:03:30.63+5.89 s | – | – | – |
| RQRRonquières | 42.7 | 111 | 12:03:32.12+7.38 s | – | – | – |
| BOUBougnies | 44.2 | 153 | 12:03:33.03+8.29 s | – | – | – |
| BRQBracquegnies | 44.5 | 131 | 12:03:31.80+7.06 s | – | – | – |
| MRDMaredsous | 92.5 | 122 | 12:03:39.96+15.22 s | 12:03:52.54+27.80 s | 12.58 | – |
| DOUDourbes | 97.9 | 137 | 12:03:40.73+15.99 s | 12:03:53.01+28.27 s | 12.28 | 9.4 |
| GESGesves | 108.6 | 111 | 12:03:43.03+18.29 s | – | – | – |
| RCHRochefort | 129.0 | 120 | 12:03:44.94+20.20 s | – | – | – |