YVOIR (BE)
Quarry blast11 January 2023
- Magnitude
- 0.6ML
- Depth
- –
- Belgian time
- 10:30:092023-01-11
- UTC
- 09:30:092023-01-11
Main parameters
| Date and time | 2023-01-11 09:30:09 UTC 2023-01-11 10:30:09 Belgian time |
|---|---|
| Magnitude | ML 0.6 |
| Epicentral coordinates | 50.290° N, 4.897° E Uncertainty ± 1.8 km |
| Event ID | ROB 18330 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-01-12 17:36:32 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
- 9.3 – 32.2km
- 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: 4 measurements, root-mean-square deviation 0.15 s. S wave: 4 measurements, root-mean-square deviation 0.14 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 | 9.3 | 278 | 09:30:11.15+2.00 s | 09:30:12.32+3.17 s | 1.17 |
| GESGesves | 17.1 | 52 | 09:30:12.45+3.30 s | 09:30:14.60+5.45 s | 2.15 |
| DOUDourbes | 30.6 | 225 | 09:30:14.79+5.64 s | 09:30:18.66+9.51 s | 3.87 |
| CLAClavier | 32.2 | 63 | 09:30:14.66+5.51 s | 09:30:19.48+10.33 s | 4.82 |