DINANT (BE)
Quarry blast17 February 2021
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 10:28:502021-02-17
- UTC
- 09:28:502021-02-17
Main parameters
| Date and time | 2021-02-17 09:28:50 UTC 2021-02-17 10:28:50 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.285° N, 4.911° E Uncertainty ± 0.5 km |
| Event ID | ROB 12470 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-24 23:07:40 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 – 31.6km
- Mean velocity, P wave
- 6.0km/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: 5 measurements, root-mean-square deviation 0.17 s. S wave: 5 measurements, root-mean-square deviation 0.18 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 | 281 | 09:28:51.89+1.79 s | 09:28:53.75+3.65 s | 1.86 |
| GESGesves | 16.8 | 48 | 09:28:53.41+3.31 s | 09:28:55.91+5.81 s | 2.50 |
| RCHRochefort | 26.8 | 123 | 09:28:54.95+4.85 s | 09:28:58.45+8.35 s | 3.50 |
| DOUDourbes | 30.9 | 227 | 09:28:55.69+5.59 s | 09:28:59.94+9.84 s | 4.25 |
| CLAClavier | 31.6 | 62 | 09:28:55.85+5.75 s | 09:28:59.92+9.82 s | 4.07 |