CONSTHUM (LU)
Quarry blast7 December 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 15:35:432021-12-07
- UTC
- 14:35:432021-12-07
Main parameters
| Date and time | 2021-12-07 14:35:43 UTC 2021-12-07 15:35:43 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 49.977° N, 6.030° E Uncertainty ± 3.9 km |
| Event ID | ROB 14945 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-12-10 09:51:18 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
- 13.2 – 103.6km
- Mean velocity, P wave
- 5.8km/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 0.09 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)4 stations | |||||
| VIAVianden | 13.2 | 110 | 14:35:45.42+2.13 s | 14:35:47.21+3.92 s | 1.79 |
| KLBKalborn | 14.9 | 22 | 14:35:45.82+2.53 s | – | – |
| HOUHouvegnez | 42.0 | 358 | 14:35:50.63+7.34 s | – | – |
| DOUDourbes | 103.6 | 278 | 14:36:01.03+17.74 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 87.9 | 355 | 14:35:58.45+15.16 s | – | – |
Did you feel an earthquake?The inquiry takes just a few minutes. Every report helps seismologists assess the effects of the earthquake.
Take the inquiry