DINANT (BE)
Quarry blast21 October 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:29:142020-10-21
- UTC
- 09:29:142020-10-21
Main parameters
| Date and time | 2020-10-21 09:29:14 UTC 2020-10-21 11:29:14 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.287° N, 4.916° E Uncertainty ± 0.4 km |
| Event ID | ROB 11130 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-21 23:06:18 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
- 6
- Epicentral distance
- 10.7 – 70.1km
- Mean velocity, P wave
- 5.8km/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: 6 measurements, root-mean-square deviation 0.14 s. S wave: 5 measurements, root-mean-square deviation 0.12 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)6 stations | |||||
| MRDMaredsous | 10.7 | 279 | 09:29:16.08+1.83 s | 09:29:17.92+3.67 s | 1.84 |
| GESGesves | 16.3 | 48 | 09:29:17.34+3.09 s | 09:29:19.73+5.48 s | 2.39 |
| RCHRochefort | 26.6 | 123 | 09:29:18.88+4.63 s | 09:29:22.58+8.33 s | 3.70 |
| CLAClavier | 31.1 | 62 | 09:29:20.03+5.78 s | 09:29:24.22+9.97 s | 4.19 |
| DOUDourbes | 31.3 | 227 | 09:29:19.87+5.62 s | 09:29:24.27+10.02 s | 4.40 |
| BOUBougnies | 70.1 | 280 | 09:29:26.52+12.27 s | – | – |