CELLES (BE)
Quarry blast15 July 2022
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:00:092022-07-15
- UTC
- 11:00:092022-07-15
Main parameters
| Date and time | 2022-07-15 11:00:09 UTC 2022-07-15 13:00:09 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.663° N, 3.466° E Uncertainty ± 22.2 km |
| Event ID | ROB 16605 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-21 23:40:25 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
- 6
- Epicentral distance
- 27.1 – 137.3km
- Mean velocity, P wave
- 6.7km/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 0.24 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 | |||||
| LESLessines | 27.1 | 79 | 11:00:14.95+5.23 s | 11:00:18.64+8.92 s | 3.69 |
| SKQSteenkerque | 43.4 | 92 | 11:00:16.86+7.14 s | 11:00:22.75+13.03 s | 5.89 |
| SNFSeneffe | 60.3 | 106 | 11:00:19.43+9.71 s | 11:00:26.50+16.78 s | 7.07 |
| TGATangissart | 75.0 | 95 | 11:00:22.05+12.33 s | – | – |
| CLAClavier | 132.9 | 101 | 11:00:32.85+23.13 s | 11:00:50.01+40.29 s | 17.16 |
| RCHRochefort | 137.3 | 114 | 11:00:33.65+23.93 s | 11:00:50.36+40.64 s | 16.71 |