CELLES (BE)
Quarry blast18 January 2022
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 13:00:152022-01-18
- UTC
- 12:00:152022-01-18
Main parameters
| Date and time | 2022-01-18 12:00:15 UTC 2022-01-18 13:00:15 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.658° N, 3.498° E Uncertainty ± 43.3 km |
| Event ID | ROB 15205 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-18 13:29:01 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
- 5
- Epicentral distance
- 41.2 – 130.6km
- Mean velocity, P wave
- 5.6km/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 0.25 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)5 stations | |||||
| SKQSteenkerque | 41.2 | 91 | 12:00:22.11+7.05 s | 12:00:27.60+12.54 s | 5.49 |
| SNFSeneffe | 58.0 | 106 | 12:00:24.55+9.49 s | – | – |
| DOUDourbes | 100.1 | 128 | 12:00:32.07+17.01 s | 12:00:44.66+29.60 s | 12.59 |
| GESGesves | 116.7 | 104 | 12:00:35.47+20.41 s | 12:00:50.03+34.97 s | 14.56 |
| CLAClavier | 130.6 | 101 | 12:00:38.08+23.02 s | 12:00:52.88+37.82 s | 14.80 |