TOURNAI (BE)
Quarry blast9 March 2022
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 13:00:472022-03-09
- UTC
- 12:00:472022-03-09
Main parameters
| Date and time | 2022-03-09 12:00:47 UTC 2022-03-09 13:00:47 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.606° N, 3.457° E Uncertainty ± 10.8 km |
| Event ID | ROB 15605 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-03-15 19:56:00 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
- 6
- Epicentral distance
- 29.7 – 118.2km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.4km/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: 6 measurements, root-mean-square deviation 0.27 s. S wave: 5 measurements, root-mean-square deviation 0.46 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)6 stations | |||||
| LESLessines | 29.7 | 67 | 12:00:52.85+5.43 s | 12:00:56.97+9.55 s | 4.12 |
| SKQSteenkerque | 44.3 | 84 | 12:00:54.83+7.41 s | 12:01:00.79+13.37 s | 5.96 |
| RQRRonquières | 54.4 | 90 | 12:00:57.21+9.79 s | – | – |
| SNFSeneffe | 59.5 | 100 | 12:00:57.35+9.93 s | 12:01:04.67+17.25 s | 7.32 |
| DOUDourbes | 98.9 | 125 | 12:01:04.43+17.01 s | 12:01:16.89+29.47 s | 12.46 |
| GESGesves | 118.2 | 101 | 12:01:07.40+19.98 s | 12:01:23.38+35.96 s | 15.98 |