DINANT (BE)
Quarry blast24 February 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 10:29:112021-02-24
- UTC
- 09:29:112021-02-24
Main parameters
| Date and time | 2021-02-24 09:29:11 UTC 2021-02-24 10:29:11 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.281° N, 4.908° E Uncertainty ± 0.7 km |
| Event ID | ROB 12535 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-26 21:21:51 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
- 10.2 – 32.0km
- Mean velocity, P wave
- 5.9km/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 0.22 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 | 10.2 | 283 | 09:29:13.00+1.78 s | 09:29:14.87+3.65 s | 1.87 |
| GESGesves | 17.2 | 48 | 09:29:14.29+3.07 s | 09:29:17.10+5.88 s | 2.81 |
| RCHRochefort | 26.7 | 121 | 09:29:15.95+4.73 s | 09:29:19.54+8.32 s | 3.59 |
| DOUDourbes | 30.4 | 227 | 09:29:16.47+5.25 s | 09:29:21.21+9.99 s | 4.74 |
| CLAClavier | 32.0 | 61 | 09:29:17.02+5.80 s | 09:29:21.67+10.45 s | 4.65 |