DINANT (BE)
Quarry blast31 July 2020
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 10:29:352020-07-31
- UTC
- 08:29:352020-07-31
Main parameters
| Date and time | 2020-07-31 08:29:35 UTC 2020-07-31 10:29:35 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.280° N, 4.906° E Uncertainty ± 0.7 km |
| Event ID | ROB 10590 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-08-03 00:12:46 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
- 10.1 – 32.1km
- 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: 5 measurements, root-mean-square deviation 0.10 s. S wave: 5 measurements, root-mean-square deviation 0.26 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 | 10.1 | 284 | 08:29:37.58+1.83 s | 08:29:39.46+3.71 s | 1.88 |
| GESGesves | 17.4 | 48 | 08:29:38.85+3.10 s | 08:29:41.39+5.64 s | 2.54 |
| RCHRochefort | 26.8 | 121 | 08:29:40.61+4.86 s | 08:29:44.27+8.52 s | 3.66 |
| DOUDourbes | 30.3 | 227 | 08:29:41.34+5.59 s | 08:29:45.15+9.40 s | 3.81 |
| CLAClavier | 32.1 | 61 | 08:29:41.56+5.81 s | 08:29:46.41+10.66 s | 4.85 |