NAMUR (BE)
Quarry blast1 February 2019
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:29:102019-02-01
- UTC
- 13:29:102019-02-01
Main parameters
| Date and time | 2019-02-01 13:29:10 UTC 2019-02-01 14:29:10 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.499° N, 4.979° E Uncertainty ± 0.8 km |
| Event ID | ROB 7775 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-02-01 15:16:12 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
- 13
- Epicentral distance
- 14.8 – 91.9km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.3km/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: 13 measurements, root-mean-square deviation 0.36 s. S wave: 10 measurements, root-mean-square deviation 0.42 s.
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)11 stations | |||||
| GESGesves | 14.8 | 149 | 13:29:12.67+2.21 s | 13:29:14.78+4.32 s | 2.11 |
| CLAClavier | 24.6 | 111 | 13:29:14.60+4.14 s | 13:29:18.17+7.71 s | 3.57 |
| MRDMaredsous | 26.6 | 214 | 13:29:15.13+4.67 s | 13:29:19.17+8.71 s | 4.04 |
| RCHRochefort | 42.2 | 155 | 13:29:17.24+6.78 s | 13:29:23.97+13.51 s | 6.73 |
| DOUDourbes | 52.6 | 211 | 13:29:19.93+9.47 s | 13:29:26.48+16.02 s | 6.55 |
| UCCSUccle | 54.9 | 307 | 13:29:19.99+9.53 s | 13:29:27.09+16.63 s | 7.10 |
| SKQSteenkerque | 65.8 | 285 | 13:29:21.23+10.77 s | 13:29:30.11+19.65 s | 8.88 |
| MEMHMembach | 74.1 | 80 | 13:29:23.78+13.32 s | 13:29:32.78+22.32 s | 9.00 |
| MEMSMembach | 74.1 | 80 | 13:29:23.78+13.32 s | – | – |
| MRGMont Rigi | 77.7 | 89 | 13:29:24.47+14.01 s | – | – |
| KLBKalborn | 91.9 | 118 | 13:29:26.46+16.00 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| VKBValkenburg | 70.1 | 54 | 13:29:22.76+12.30 s | 13:29:31.57+21.11 s | 8.81 |
| HGNHeimansgroeve | 73.5 | 66 | 13:29:23.27+12.81 s | 13:29:31.87+21.41 s | 8.60 |