DINANT (BE)
Quarry blast28 January 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 10:29:432021-01-28
- UTC
- 09:29:432021-01-28
Main parameters
| Date and time | 2021-01-28 09:29:43 UTC 2021-01-28 10:29:43 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.259° N, 4.881° E Uncertainty ± 1.0 km |
| Event ID | ROB 12170 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-08 00:15:53 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
- 9.3 – 34.9km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.5km/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 0.23 s. S wave: 5 measurements, root-mean-square deviation 0.62 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 | 9.3 | 301 | 09:29:45.53+2.21 s | 09:29:46.52+3.20 s | 0.99 |
| GESGesves | 20.3 | 46 | 09:29:46.83+3.51 s | 09:29:48.50+5.18 s | 1.67 |
| RCHRochefort | 27.3 | 115 | 09:29:48.49+5.17 s | 09:29:51.98+8.66 s | 3.49 |
| DOUDourbes | 27.4 | 228 | 09:29:48.13+4.81 s | 09:29:50.76+7.44 s | 2.63 |
| CLAClavier | 34.9 | 59 | 09:29:49.48+6.16 s | 09:29:54.11+10.79 s | 4.63 |