NAMUR (BE)
Quarry blast6 January 2022
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:22:272022-01-06
- UTC
- 13:22:272022-01-06
Main parameters
| Date and time | 2022-01-06 13:22:27 UTC 2022-01-06 14:22:27 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.501° N, 4.979° E Uncertainty ± 1.1 km |
| Event ID | ROB 15120 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-10 10:34:29 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
- 9
- Epicentral distance
- 15.0 – 92.0km
- Mean velocity, P wave
- 6.1km/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: 9 measurements, root-mean-square deviation 0.27 s. S wave: 8 measurements, root-mean-square deviation 0.74 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)8 stations | |||||
| GESGesves | 15.0 | 149 | 13:22:30.08+2.57 s | 13:22:32.29+4.78 s | 2.21 |
| CLAClavier | 24.7 | 111 | 13:22:31.86+4.35 s | 13:22:35.07+7.56 s | 3.21 |
| MRDMaredsous | 26.7 | 214 | 13:22:32.11+4.60 s | 13:22:36.11+8.60 s | 4.00 |
| TGATangissart | 34.4 | 290 | 13:22:33.28+5.77 s | 13:22:38.08+10.57 s | 4.80 |
| SNFSeneffe | 49.3 | 272 | 13:22:36.05+8.54 s | – | – |
| DOUDourbes | 52.7 | 211 | 13:22:36.93+9.42 s | 13:22:44.49+16.98 s | 7.56 |
| MEMSMembach | 74.1 | 80 | 13:22:40.54+13.03 s | 13:22:50.63+23.12 s | 10.09 |
| KLBKalborn | 92.0 | 119 | 13:22:43.27+15.76 s | 13:22:53.45+25.94 s | 10.18 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.5 | 66 | 13:22:39.80+12.29 s | 13:22:49.64+22.13 s | 9.84 |