DINANT (BE)
Quarry blast15 April 2021
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 10:29:212021-04-15
- UTC
- 08:29:212021-04-15
Main parameters
| Date and time | 2021-04-15 08:29:21 UTC 2021-04-15 10:29:21 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.286° N, 4.906° E Uncertainty ± 0.4 km |
| Event ID | ROB 13145 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-15 14:58:26 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
- 10.0 – 31.8km
- 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 0.13 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 | 10.0 | 280 | 08:29:23.43+1.83 s | 08:29:25.04+3.44 s | 1.61 |
| GESGesves | 17.0 | 49 | 08:29:24.60+3.00 s | 08:29:27.51+5.91 s | 2.91 |
| RCHRochefort | 27.2 | 122 | 08:29:26.32+4.72 s | 08:29:30.05+8.45 s | 3.73 |
| DOUDourbes | 30.7 | 226 | 08:29:27.25+5.65 s | 08:29:31.46+9.86 s | 4.21 |
| CLAClavier | 31.8 | 62 | 08:29:27.29+5.69 s | 08:29:31.94+10.34 s | 4.65 |