CELLES (BE)
Quarry blast12 December 2022
- Magnitude
- 2.3ML
- Depth
- –
- Belgian time
- 13:19:422022-12-12
- UTC
- 12:19:422022-12-12
Main parameters
| Date and time | 2022-12-12 12:19:42 UTC 2022-12-12 13:19:42 Belgian time |
|---|---|
| Magnitude | ML 2.3 |
| Epicentral coordinates | 50.676° N, 3.513° E Uncertainty ± 4.1 km |
| Event ID | ROB 18015 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-12-16 11:28:04 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
- 6
- Epicentral distance
- 40.2 – 195.4km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.2km/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: 4 measurements, root-mean-square deviation 0.23 s. S wave: 4 measurements, root-mean-square deviation 0.41 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)6 stations | |||||
| SKQSteenkerque | 40.2 | 94 | 12:19:48.86+6.80 s | 12:19:54.62+12.56 s | 5.76 |
| BLRGBlaregnies | 44.9 | 142 | 12:19:49.71+7.65 s | 12:19:55.63+13.57 s | 5.92 |
| SNFSeneffe | 57.6 | 108 | 12:19:51.31+9.25 s | 12:19:58.99+16.93 s | 7.68 |
| GESGesves | 116.2 | 106 | 12:20:01.54+19.48 s | 12:20:18.14+36.08 s | 16.60 |
| CLAClavier | 130.0 | 102 | 12:20:04.69+22.63 s | 12:20:21.75+39.69 s | 17.06 |
| KLBKalborn | 195.4 | 108 | 12:20:13.52+31.46 s | 12:20:35.66+53.60 s | 22.14 |