DINANT (BE)
Quarry blast2 August 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 09:29:132021-08-02
- UTC
- 07:29:132021-08-02
Main parameters
| Date and time | 2021-08-02 07:29:13 UTC 2021-08-02 09:29:13 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.283° N, 4.907° E Uncertainty ± 0.7 km |
| Event ID | ROB 14155 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-08-06 18:22:43 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
- 10.1 – 31.9km
- Mean velocity, P wave
- 6.0km/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 0.12 s. S wave: 5 measurements, root-mean-square deviation 0.13 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 | 10.1 | 282 | 07:29:15.51+1.94 s | 07:29:17.12+3.55 s | 1.61 |
| GESGesves | 17.1 | 48 | 07:29:16.83+3.26 s | 07:29:19.18+5.61 s | 2.35 |
| RCHRochefort | 26.9 | 122 | 07:29:18.42+4.85 s | 07:29:21.99+8.42 s | 3.57 |
| DOUDourbes | 30.6 | 227 | 07:29:18.81+5.24 s | 07:29:23.45+9.88 s | 4.64 |
| CLAClavier | 31.9 | 62 | 07:29:19.39+5.82 s | 07:29:23.86+10.29 s | 4.47 |