DINANT (BE)
Quarry blast31 January 2020
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 10:28:322020-01-31
- UTC
- 09:28:322020-01-31
Main parameters
| Date and time | 2020-01-31 09:28:32 UTC 2020-01-31 10:28:32 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.285° N, 4.904° E Uncertainty ± 0.4 km |
| Event ID | ROB 9205 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-01-31 11:31:25 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
- 9.9 – 32.0km
- Mean velocity, P wave
- 6.0km/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 0.11 s. S wave: 4 measurements, root-mean-square deviation 0.16 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 | 9.9 | 281 | 09:28:34.80+1.84 s | 09:28:36.44+3.48 s | 1.64 |
| GESGesves | 17.1 | 49 | 09:28:36.21+3.25 s | 09:28:38.79+5.83 s | 2.58 |
| RCHRochefort | 27.2 | 122 | 09:28:37.86+4.90 s | 09:28:41.46+8.50 s | 3.60 |
| DOUDourbes | 30.6 | 226 | 09:28:38.33+5.37 s | 09:28:42.79+9.83 s | 4.46 |
| CLAClavier | 32.0 | 62 | 09:28:38.79+5.83 s | – | – |