NAMUR (BE)
Quarry blast15 February 2019
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 14:17:062019-02-15
- UTC
- 13:17:062019-02-15
Main parameters
| Date and time | 2019-02-15 13:17:06 UTC 2019-02-15 14:17:06 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.504° N, 4.962° E Uncertainty ± 1.3 km |
| Event ID | ROB 7835 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-02-15 16:10:47 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
- 17
- Epicentral distance
- 15.9 – 126.3km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.4km/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: 16 measurements, root-mean-square deviation 0.43 s. S wave: 11 measurements, root-mean-square deviation 0.56 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)16 stations | |||||
| GESGesves | 15.9 | 146 | 13:17:08.89+2.32 s | 13:17:11.34+4.77 s | 2.45 |
| CLAClavier | 25.9 | 111 | 13:17:10.83+4.26 s | 13:17:14.60+8.03 s | 3.77 |
| MRDMaredsous | 26.3 | 212 | 13:17:11.24+4.67 s | 13:17:14.33+7.76 s | 3.09 |
| RCHRochefort | 43.1 | 154 | 13:17:13.84+7.27 s | 13:17:19.37+12.80 s | 5.53 |
| LCHLa Chartreuse | 47.6 | 71 | 13:17:14.79+8.22 s | – | – |
| DOUDourbes | 52.4 | 210 | 13:17:16.16+9.59 s | 13:17:22.73+16.16 s | 6.57 |
| UCCBUccle | 53.7 | 308 | 13:17:15.90+9.33 s | 13:17:23.63+17.06 s | 7.73 |
| BRQBracquegnies | 58.7 | 268 | 13:17:16.85+10.28 s | – | – |
| EBNEben-Emael | 60.2 | 57 | 13:17:18.37+11.80 s | – | – |
| SKQSteenkerque | 64.6 | 285 | 13:17:17.39+10.82 s | – | – |
| MEMHMembach | 75.2 | 81 | 13:17:19.76+13.19 s | 13:17:29.02+22.45 s | 9.26 |
| MEMSMembach | 75.2 | 81 | 13:17:19.81+13.24 s | – | – |
| HOUHouvegnez | 75.9 | 102 | 13:17:19.54+12.97 s | 13:17:28.99+22.42 s | 9.45 |
| OPTBOpitter | 82.7 | 35 | 13:17:20.89+14.32 s | 13:17:30.68+24.11 s | 9.79 |
| KLBKalborn | 93.2 | 118 | 13:17:22.65+16.08 s | 13:17:32.84+26.27 s | 10.19 |
| WLFWalferdange | 126.3 | 137 | 13:17:28.95+22.38 s | 13:17:42.09+35.52 s | 13.14 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 74.5 | 67 | 13:17:19.15+12.58 s | 13:17:28.99+22.42 s | 9.84 |