YVOIR (BE)
Quarry blast5 October 2021
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 10:30:182021-10-05
- UTC
- 08:30:182021-10-05
Main parameters
| Date and time | 2021-10-05 08:30:18 UTC 2021-10-05 10:30:18 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.295° N, 4.915° E Uncertainty ± 1.3 km |
| Event ID | ROB 14575 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-10-05 10:47:53 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
- 10.5 – 31.9km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.1km/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 0.32 s. S wave: 5 measurements, root-mean-square deviation 0.40 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 | 10.5 | 274 | 08:30:20.32+2.18 s | 08:30:21.76+3.62 s | 1.44 |
| GESGesves | 15.8 | 51 | 08:30:20.97+2.83 s | 08:30:23.23+5.09 s | 2.26 |
| RCHRochefort | 27.2 | 125 | 08:30:22.72+4.58 s | 08:30:26.82+8.68 s | 4.10 |
| CLAClavier | 30.8 | 63 | 08:30:24.31+6.17 s | 08:30:28.95+10.81 s | 4.64 |
| DOUDourbes | 31.9 | 226 | 08:30:23.85+5.71 s | 08:30:28.15+10.01 s | 4.30 |