DINANT (BE)
Quarry blast28 June 2021
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 10:29:252021-06-28
- UTC
- 08:29:252021-06-28
Main parameters
| Date and time | 2021-06-28 08:29:25 UTC 2021-06-28 10:29:25 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.270° N, 4.903° E Uncertainty ± 1.4 km |
| Event ID | ROB 13840 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-07-06 17:01:20 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
- 4
- Epicentral distance
- 10.3 – 32.9km
- Mean velocity, P wave
- 6.1km/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: 4 measurements, root-mean-square deviation 0.18 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)4 stations | |||||
| MRDMaredsous | 10.3 | 290 | 08:29:27.33+1.89 s | 08:29:29.20+3.76 s | 1.87 |
| GESGesves | 18.3 | 46 | 08:29:28.62+3.18 s | 08:29:31.49+6.05 s | 2.87 |
| RCHRochefort | 26.4 | 119 | 08:29:30.38+4.94 s | 08:29:33.75+8.31 s | 3.37 |
| CLAClavier | 32.9 | 60 | 08:29:31.18+5.74 s | 08:29:35.90+10.46 s | 4.72 |