YVOIR (BE)
Quarry blast20 July 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 10:30:212022-07-20
- UTC
- 08:30:212022-07-20
Main parameters
| Date and time | 2022-07-20 08:30:21 UTC 2022-07-20 10:30:21 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.294° N, 4.912° E Uncertainty ± 0.7 km |
| Event ID | ROB 16645 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-22 10:51:05 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
- 10.3 – 31.7km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.3km/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 0.15 s. S wave: 4 measurements, root-mean-square deviation 0.10 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 | |||||
| MRDMaredsous | 10.3 | 275 | 08:30:23.33+2.05 s | 08:30:24.88+3.60 s | 1.55 |
| GESGesves | 16.0 | 51 | 08:30:24.50+3.22 s | 08:30:26.34+5.06 s | 1.84 |
| RCHRochefort | 27.2 | 124 | 08:30:26.31+5.03 s | 08:30:29.74+8.46 s | 3.43 |
| CLAClavier | 31.0 | 63 | 08:30:27.22+5.94 s | – | – |
| DOUDourbes | 31.7 | 226 | 08:30:26.89+5.61 s | 08:30:31.20+9.92 s | 4.31 |