DINANT (BE)
Quarry blast27 January 2021
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 10:28:132021-01-27
- UTC
- 09:28:132021-01-27
Main parameters
| Date and time | 2021-01-27 09:28:13 UTC 2021-01-27 10:28:13 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.285° N, 4.912° E Uncertainty ± 0.8 km |
| Event ID | ROB 12155 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-08 00:10:36 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
- 10.5 – 31.5km
- Mean velocity, P wave
- 6.7km/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: 5 measurements, root-mean-square deviation 0.41 s. S wave: 5 measurements, root-mean-square deviation 0.19 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 | 10.5 | 281 | 09:28:15.54+1.80 s | 09:28:17.46+3.72 s | 1.92 |
| GESGesves | 16.7 | 48 | 09:28:16.81+3.07 s | 09:28:19.55+5.81 s | 2.74 |
| RCHRochefort | 26.7 | 123 | 09:28:18.40+4.66 s | 09:28:22.13+8.39 s | 3.73 |
| DOUDourbes | 30.9 | 227 | 09:28:19.36+5.62 s | 09:28:23.57+9.83 s | 4.21 |
| CLAClavier | 31.5 | 62 | 09:28:18.25+4.51 s | 09:28:24.09+10.35 s | 5.84 |