DINANT (BE)
Quarry blast4 September 2020
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 09:30:272020-09-04
- UTC
- 07:30:272020-09-04
Main parameters
| Date and time | 2020-09-04 07:30:27 UTC 2020-09-04 09:30:27 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.281° N, 4.904° E Uncertainty ± 0.7 km |
| Event ID | ROB 10805 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-04 16:15:26 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 – 32.3km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.1km/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 0.10 s. S wave: 5 measurements, root-mean-square deviation 0.20 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 | 284 | 07:30:29.38+1.71 s | 07:30:31.27+3.60 s | 1.89 |
| GESGesves | 17.5 | 48 | 07:30:30.74+3.07 s | 07:30:33.65+5.98 s | 2.91 |
| RCHRochefort | 27.0 | 121 | 07:30:32.38+4.71 s | 07:30:36.24+8.57 s | 3.86 |
| DOUDourbes | 30.2 | 227 | 07:30:33.02+5.35 s | 07:30:37.44+9.77 s | 4.42 |
| CLAClavier | 32.3 | 61 | 07:30:33.39+5.72 s | 07:30:38.42+10.75 s | 5.03 |