TOURNAI (BE)
Quarry blast28 January 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:01:202022-01-28
- UTC
- 12:01:202022-01-28
Main parameters
| Date and time | 2022-01-28 12:01:20 UTC 2022-01-28 13:01:20 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.598° N, 3.374° E Uncertainty ± 10.9 km |
| Event ID | ROB 15325 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-07 09:22:22 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
- 7
- Epicentral distance
- 35.4 – 138.2km
- Mean velocity, P wave
- 6.6km/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 0.18 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)7 stations | |||||
| LESLessines | 35.4 | 69 | 12:01:27.50+6.91 s | 12:01:31.27+10.68 s | 3.77 |
| SKQSteenkerque | 50.3 | 83 | 12:01:29.46+8.87 s | 12:01:34.59+14.00 s | 5.13 |
| BRQBracquegnies | 55.6 | 103 | 12:01:30.02+9.43 s | – | – |
| RQRRonquières | 60.2 | 89 | 12:01:31.12+10.53 s | – | – |
| UCCSUccle | 73.1 | 72 | 12:01:32.89+12.30 s | – | – |
| TGATangissart | 81.3 | 89 | 12:01:34.40+13.81 s | 12:01:44.96+24.37 s | 10.56 |
| CLAClavier | 138.2 | 98 | 12:01:44.27+23.68 s | – | – |