WALCOURT (BE)
Quarry blast11 August 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 15:06:082022-08-11
- UTC
- 13:06:082022-08-11
Main parameters
| Date and time | 2022-08-11 13:06:08 UTC 2022-08-11 15:06:08 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.240° N, 4.489° E Uncertainty ± 5.2 km |
| Event ID | ROB 16805 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-11 23:28:22 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
- 17.8 – 116.8km
- Mean velocity, P wave
- 5.9km/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: 5 measurements, root-mean-square deviation 0.53 s. S wave: 5 measurements, root-mean-square deviation 0.53 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)5 stations | |||||
| DOUDourbes | 17.8 | 155 | 13:06:12.11+3.19 s | 13:06:14.93+6.01 s | 2.82 |
| MRDMaredsous | 21.0 | 71 | 13:06:12.80+3.88 s | 13:06:15.51+6.59 s | 2.71 |
| GESGesves | 45.5 | 69 | 13:06:18.16+9.24 s | 13:06:23.97+15.05 s | 5.81 |
| RCHRochefort | 53.5 | 100 | 13:06:18.08+9.16 s | 13:06:24.90+15.98 s | 6.82 |
| KLBKalborn | 116.8 | 97 | 13:06:29.37+20.45 s | 13:06:43.45+34.53 s | 14.08 |