CELLES (BE)
Quarry blast20 January 2022
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 13:00:092022-01-20
- UTC
- 12:00:092022-01-20
Main parameters
| Date and time | 2022-01-20 12:00:09 UTC 2022-01-20 13:00:09 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.699° N, 3.432° E Uncertainty ± 10.7 km |
| Event ID | ROB 15230 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-20 17:22:39 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
- 46.2 – 201.7km
- Mean velocity, P wave
- 4.9km/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: 5 measurements, root-mean-square deviation 0.50 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)8 stations | |||||
| SKQSteenkerque | 46.2 | 97 | 12:00:17.04+7.79 s | 12:00:22.62+13.37 s | 5.58 |
| RQRRonquières | 57.0 | 100 | 12:00:19.68+10.43 s | – | – |
| SNFSeneffe | 63.9 | 109 | 12:00:19.61+10.36 s | – | – |
| UCCBUccle | 66.4 | 80 | 12:00:20.72+11.47 s | – | – |
| DOUDourbes | 106.6 | 129 | 12:00:29.36+20.11 s | 12:00:39.96+30.71 s | 10.60 |
| GESGesves | 122.4 | 106 | 12:00:29.70+20.45 s | 12:00:46.43+37.18 s | 16.73 |
| CLAClavier | 136.1 | 103 | 12:00:32.07+22.82 s | 12:00:49.68+40.43 s | 17.61 |
| KLBKalborn | 201.7 | 108 | 12:00:41.50+32.25 s | – | – |