LESSINES (BE)
Quarry blast15 October 2019
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:41:052019-10-15
- UTC
- 10:41:052019-10-15
Main parameters
| Date and time | 2019-10-15 10:41:05 UTC 2019-10-15 12:41:05 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.725° N, 3.854° E Uncertainty ± 5.3 km |
| Event ID | ROB 8745 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-10-15 12:51:21 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
- 12
- Epicentral distance
- 1.7 – 152.9km
- Mean velocity, P wave
- 5.5km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 11 measurements, root-mean-square deviation 0.30 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)12 stations | |||||
| LESLessines | 1.7 | 208 | 10:41:05.22+0.17 s | 10:41:05.43+0.38 s | 0.21 |
| SKQSteenkerque | 18.0 | 118 | 10:41:07.81+2.76 s | 10:41:10.02+4.97 s | 2.21 |
| RQRRonquières | 29.3 | 117 | 10:41:09.71+4.66 s | – | – |
| BRQBracquegnies | 33.6 | 144 | 10:41:10.61+5.56 s | – | – |
| UCCBUccle | 36.6 | 77 | 10:41:11.50+6.45 s | 10:41:15.45+10.40 s | 3.95 |
| BOUBougnies | 37.9 | 170 | 10:41:12.05+7.00 s | – | – |
| MRDMaredsous | 80.1 | 126 | 10:41:19.25+14.20 s | – | – |
| DOUDourbes | 87.6 | 143 | 10:41:20.57+15.52 s | – | – |
| GESGesves | 95.2 | 113 | 10:41:22.55+17.50 s | – | – |
| CLAClavier | 108.0 | 108 | 10:41:24.49+19.44 s | – | – |
| RCHRochefort | 116.3 | 122 | 10:41:25.39+20.34 s | – | – |
| MEMHMembach | 152.9 | 94 | 10:41:30.81+25.76 s | – | – |