DINANT (BE)
Quarry blast18 November 2020
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 10:28:582020-11-18
- UTC
- 09:28:582020-11-18
Main parameters
| Date and time | 2020-11-18 09:28:58 UTC 2020-11-18 10:28:58 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.284° N, 4.909° E Uncertainty ± 0.8 km |
| Event ID | ROB 11360 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-20 12:07:43 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
- 10.2 – 31.8km
- 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: 5 measurements, root-mean-square deviation 0.12 s. S wave: 5 measurements, root-mean-square deviation 0.23 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 | 10.2 | 281 | 09:29:00.69+1.91 s | 09:29:02.34+3.56 s | 1.65 |
| GESGesves | 17.0 | 48 | 09:29:01.88+3.10 s | 09:29:04.43+5.65 s | 2.55 |
| RCHRochefort | 26.9 | 122 | 09:29:03.66+4.88 s | 09:29:07.02+8.24 s | 3.36 |
| DOUDourbes | 30.7 | 227 | 09:29:04.10+5.32 s | 09:29:08.80+10.02 s | 4.70 |
| CLAClavier | 31.8 | 62 | 09:29:04.65+5.87 s | 09:29:09.16+10.38 s | 4.51 |