DINANT (BE)
Quarry blast12 August 2021
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 10:29:282021-08-12
- UTC
- 08:29:282021-08-12
Main parameters
| Date and time | 2021-08-12 08:29:28 UTC 2021-08-12 10:29:28 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.289° N, 4.911° E Uncertainty ± 1.2 km |
| Event ID | ROB 14225 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-08-16 09:34:48 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
- 10.3 – 31.3km
- Mean velocity, P wave
- 5.8km/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 0.20 s. S wave: 4 measurements, root-mean-square deviation 0.15 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 | 278 | 08:29:30.77+2.13 s | 08:29:32.12+3.48 s | 1.35 |
| GESGesves | 16.4 | 50 | 08:29:31.94+3.30 s | 08:29:33.77+5.13 s | 1.83 |
| RCHRochefort | 27.1 | 123 | 08:29:33.47+4.83 s | – | – |
| DOUDourbes | 31.3 | 226 | 08:29:33.98+5.34 s | 08:29:38.74+10.10 s | 4.76 |
| CLAClavier | 31.3 | 62 | 08:29:34.54+5.90 s | 08:29:38.81+10.17 s | 4.27 |