CELLES (BE)
Quarry blast13 December 2022
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 13:00:142022-12-13
- UTC
- 12:00:142022-12-13
Main parameters
| Date and time | 2022-12-13 12:00:14 UTC 2022-12-13 13:00:14 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.672° N, 3.469° E Uncertainty ± 35.6 km |
| Event ID | ROB 18035 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-12-16 11:29:25 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
- 7
- Epicentral distance
- 43.3 – 133.0km
- Mean velocity, P wave
- 5.5km/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: 6 measurements, root-mean-square deviation 0.46 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)7 stations | |||||
| SKQSteenkerque | 43.3 | 93 | 12:00:21.39+7.17 s | 12:00:27.30+13.08 s | 5.91 |
| BLRGBlaregnies | 46.5 | 139 | 12:00:22.49+8.27 s | 12:00:28.31+14.09 s | 5.82 |
| RQRRonquières | 54.0 | 98 | 12:00:23.12+8.90 s | – | – |
| SNFSeneffe | 60.4 | 107 | 12:00:24.04+9.82 s | 12:00:32.48+18.26 s | 8.44 |
| DOUDourbes | 102.6 | 128 | 12:00:31.54+17.32 s | – | – |
| GESGesves | 119.1 | 105 | 12:00:35.74+21.52 s | – | – |
| CLAClavier | 133.0 | 102 | 12:00:37.33+23.11 s | 12:00:55.06+40.84 s | 17.73 |