LEUZE-EN-HAINAUT (BE)
Quarry blast4 April 2022
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:00:122022-04-04
- UTC
- 11:00:122022-04-04
Main parameters
| Date and time | 2022-04-04 11:00:12 UTC 2022-04-04 13:00:12 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.583° N, 3.587° E Uncertainty ± 7.2 km |
| Event ID | ROB 15875 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-04-06 09:37:38 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
- 8
- Epicentral distance
- 35.7 – 187.4km
- 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: 6 measurements, root-mean-square deviation 0.21 s. S wave: 4 measurements, root-mean-square deviation 0.49 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)8 stations | |||||
| SKQSteenkerque | 35.7 | 78 | 11:00:18.86+6.01 s | 11:00:24.49+11.64 s | 5.63 |
| RQRRonquières | 45.3 | 87 | 11:00:20.82+7.97 s | – | – |
| SNFSeneffe | 50.1 | 99 | 11:00:21.24+8.39 s | 11:00:27.48+14.63 s | 6.24 |
| MRDMaredsous | 89.6 | 110 | 11:00:28.57+15.72 s | 11:00:39.92+27.07 s | 11.35 |
| DOUDourbes | 90.0 | 127 | 11:00:28.71+15.86 s | 11:00:40.02+27.17 s | 11.31 |
| GESGesves | 108.7 | 101 | 11:00:31.64+18.79 s | – | – |
| RCHRochefort | 126.0 | 112 | 11:00:33.05+20.20 s | 11:00:48.80+35.95 s | 15.75 |
| KLBKalborn | 187.4 | 106 | 11:00:37.25+24.40 s | 11:01:06.89+54.04 s | 29.64 |