KAYL (LU)
Quarry blast12 April 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:00:462021-04-12
- UTC
- 10:00:462021-04-12
Main parameters
| Date and time | 2021-04-12 10:00:46 UTC 2021-04-12 12:00:46 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 49.481° N, 6.006° E Uncertainty ± 3.6 km |
| Event ID | ROB 13090 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-12 22:38:11 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
- 6
- Epicentral distance
- 52.4 – 122.4km
- Mean velocity, P wave
- 6.3km/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: 4 measurements, root-mean-square deviation 0.32 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)6 stations | |||||
| VIAVianden | 52.4 | 16 | 10:00:55.18+8.97 s | 10:01:01.69+15.48 s | 6.51 |
| KLBKalborn | 69.2 | 6 | 10:00:57.95+11.74 s | 10:01:06.23+20.02 s | 8.28 |
| RCHRochefort | 93.6 | 323 | 10:01:01.26+15.05 s | 10:01:14.24+28.03 s | 12.98 |
| HOUHouvegnez | 97.1 | 360 | 10:01:02.71+16.50 s | – | – |
| GESGesves | 120.3 | 327 | 10:01:06.48+20.27 s | 10:01:21.54+35.33 s | 15.06 |
| DOUDourbes | 122.4 | 304 | 10:01:06.04+19.83 s | 10:01:21.67+35.46 s | 15.63 |