DINANT (BE)
Quarry blast18 May 2021
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 14:29:382021-05-18
- UTC
- 12:29:382021-05-18
Main parameters
| Date and time | 2021-05-18 12:29:38 UTC 2021-05-18 14:29:38 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.286° N, 4.901° E Uncertainty ± 0.9 km |
| Event ID | ROB 13460 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-18 17:32:00 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
- 9.7 – 44.5km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.4km/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 0.20 s. S wave: 5 measurements, root-mean-square deviation 0.32 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 | 9.7 | 281 | 12:29:40.77+1.98 s | 12:29:41.75+2.96 s | 0.98 |
| GESGesves | 17.2 | 50 | 12:29:42.32+3.53 s | 12:29:44.68+5.89 s | 2.36 |
| RCHRochefort | 27.4 | 122 | 12:29:43.41+4.62 s | 12:29:47.21+8.42 s | 3.80 |
| DOUDourbes | 30.5 | 226 | 12:29:44.40+5.61 s | 12:29:48.65+9.86 s | 4.25 |
| TGATangissart | 44.5 | 323 | 12:29:46.59+7.80 s | 12:29:52.10+13.31 s | 5.51 |