DINANT (BE)
Quarry blast19 March 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 10:33:152021-03-19
- UTC
- 09:33:152021-03-19
Main parameters
| Date and time | 2021-03-19 09:33:15 UTC 2021-03-19 10:33:15 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.286° N, 4.909° E Uncertainty ± 1.2 km |
| Event ID | ROB 12805 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-19 18:17:08 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
- 6
- Epicentral distance
- 10.2 – 60.3km
- Mean velocity, P wave
- 6.4km/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: 6 measurements, root-mean-square deviation 0.18 s. S wave: 5 measurements, root-mean-square deviation 0.34 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)6 stations | |||||
| MRDMaredsous | 10.2 | 280 | 09:33:17.43+1.92 s | 09:33:19.18+3.67 s | 1.75 |
| GESGesves | 16.8 | 49 | 09:33:18.65+3.14 s | 09:33:21.42+5.91 s | 2.77 |
| RCHRochefort | 26.9 | 123 | 09:33:20.46+4.95 s | 09:33:23.67+8.16 s | 3.21 |
| DOUDourbes | 30.9 | 227 | 09:33:21.11+5.60 s | 09:33:25.47+9.96 s | 4.36 |
| CLAClavier | 31.6 | 62 | 09:33:21.18+5.67 s | 09:33:26.11+10.60 s | 4.93 |
| RQRRonquières | 60.3 | 306 | 09:33:25.31+9.80 s | – | – |