WELLIN (BE)
Quarry blast18 July 2022
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 12:40:422022-07-18
- UTC
- 10:40:422022-07-18
Main parameters
| Date and time | 2022-07-18 10:40:42 UTC 2022-07-18 12:40:42 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.079° N, 5.125° E Uncertainty ± 1.5 km |
| Event ID | ROB 16630 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-21 23:46:03 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
- 11.2 – 70.5km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.4km/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 0.23 s. S wave: 6 measurements, root-mean-square deviation 0.31 s.
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 | |||||
| RCHRochefort | 11.2 | 41 | 10:40:44.57+2.22 s | 10:40:45.60+3.25 s | 1.03 |
| GESGesves | 34.1 | 355 | 10:40:48.66+6.31 s | 10:40:53.00+10.65 s | 4.34 |
| MRDMaredsous | 35.6 | 314 | 10:40:48.81+6.46 s | 10:40:53.26+10.91 s | 4.45 |
| DOUDourbes | 38.0 | 273 | 10:40:48.90+6.55 s | 10:40:53.72+11.37 s | 4.82 |
| CLAClavier | 39.9 | 18 | 10:40:49.94+7.59 s | 10:40:54.83+12.48 s | 4.89 |
| KLBKalborn | 70.5 | 88 | 10:40:55.35+13.00 s | 10:41:03.04+20.69 s | 7.69 |