ASSESSE (BE)
Quarry blast11 April 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:25:082022-04-11
- UTC
- 11:25:082022-04-11
Main parameters
| Date and time | 2022-04-11 11:25:08 UTC 2022-04-11 13:25:08 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.354° N, 4.969° E Uncertainty ± 2.0 km |
| Event ID | ROB 15935 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-04-14 09:26:48 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
- 9.1 – 39.3km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.2km/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 0.13 s. S wave: 5 measurements, root-mean-square deviation 0.34 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 | |||||
| GESGesves | 9.1 | 67 | 11:25:10.44+1.55 s | 11:25:11.96+3.07 s | 1.52 |
| MRDMaredsous | 15.4 | 248 | 11:25:12.01+3.12 s | 11:25:13.57+4.68 s | 1.56 |
| CLAClavier | 24.8 | 73 | 11:25:13.57+4.68 s | 11:25:17.06+8.17 s | 3.49 |
| RCHRochefort | 28.8 | 140 | 11:25:14.28+5.39 s | 11:25:17.30+8.41 s | 3.02 |
| DOUDourbes | 39.3 | 223 | 11:25:16.13+7.24 s | 11:25:21.24+12.35 s | 5.11 |