WALCOURT (BE)
Quarry blast31 August 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 17:00:592022-08-31
- UTC
- 15:00:592022-08-31
Main parameters
| Date and time | 2022-08-31 15:00:59 UTC 2022-08-31 17:00:59 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.230° N, 4.488° E Uncertainty ± 4.4 km |
| Event ID | ROB 17050 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-09-07 09:47:25 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
- 5
- Epicentral distance
- 16.9 – 116.7km
- 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 0.34 s. S wave: 5 measurements, root-mean-square deviation 0.52 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 | 16.9 | 153 | 15:01:02.36+3.22 s | 15:01:04.71+5.57 s | 2.35 |
| MRDMaredsous | 21.5 | 68 | 15:01:03.05+3.91 s | 15:01:05.93+6.79 s | 2.88 |
| GESGesves | 46.0 | 68 | 15:01:06.80+7.66 s | 15:01:14.24+15.10 s | 7.44 |
| RCHRochefort | 53.4 | 99 | 15:01:08.44+9.30 s | 15:01:15.20+16.06 s | 6.76 |
| KLBKalborn | 116.7 | 96 | 15:01:19.76+20.62 s | 15:01:33.59+34.45 s | 13.83 |