YVOIR (BE)
Quarry blast11 June 2021
- Magnitude
- 0.6ML
- Depth
- –
- Belgian time
- 10:31:442021-06-11
- UTC
- 08:31:442021-06-11
Main parameters
| Date and time | 2021-06-11 08:31:44 UTC 2021-06-11 10:31:44 Belgian time |
|---|---|
| Magnitude | ML 0.6 |
| Epicentral coordinates | 50.297° N, 4.905° E Uncertainty ± 3.4 km |
| Event ID | ROB 13650 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-11 17:39:11 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
- 4
- Epicentral distance
- 9.8 – 31.5km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.5km/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: 4 measurements, root-mean-square deviation 0.30 s. S wave: 4 measurements, root-mean-square deviation 0.27 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)4 stations | |||||
| MRDMaredsous | 9.8 | 274 | 08:31:45.94+1.70 s | 08:31:47.76+3.52 s | 1.82 |
| GESGesves | 16.3 | 53 | 08:31:47.44+3.20 s | 08:31:49.84+5.60 s | 2.40 |
| CLAClavier | 31.4 | 64 | 08:31:49.97+5.73 s | 08:31:53.54+9.30 s | 3.57 |
| DOUDourbes | 31.5 | 225 | 08:31:50.50+6.26 s | 08:31:53.77+9.53 s | 3.27 |