TOURNAI (BE)
Quarry blast10 February 2022
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 13:00:082022-02-10
- UTC
- 12:00:082022-02-10
Main parameters
| Date and time | 2022-02-10 12:00:08 UTC 2022-02-10 13:00:08 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.672° N, 3.414° E Uncertainty ± 17.1 km |
| Event ID | ROB 15450 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-11 11:19:15 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
- 10
- Epicentral distance
- 47.2 – 189.3km
- Mean velocity, P wave
- 5.5km/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: 6 measurements, root-mean-square deviation 0.77 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)10 stations | |||||
| SKQSteenkerque | 47.2 | 93 | 12:00:17.39+8.93 s | 12:00:22.08+13.62 s | 4.69 |
| RQRRonquières | 57.9 | 97 | 12:00:18.31+9.85 s | – | – |
| BDHNBois d'Haine | 59.5 | 107 | 12:00:17.04+8.58 s | – | – |
| SNFSeneffe | 64.2 | 106 | 12:00:19.46+11.00 s | 12:00:27.23+18.77 s | 7.77 |
| TGATangissart | 78.7 | 95 | 12:00:22.30+13.84 s | – | – |
| DOUDourbes | 105.7 | 127 | 12:00:27.20+18.74 s | 12:00:39.79+31.33 s | 12.59 |
| GESGesves | 122.9 | 104 | 12:00:29.88+21.42 s | – | – |
| CLAClavier | 136.8 | 101 | 12:00:32.22+23.76 s | 12:00:49.02+40.56 s | 16.80 |
| RCHRochefort | 141.1 | 113 | 12:00:29.59+21.13 s | 12:00:50.59+42.13 s | 21.00 |
| MRGMont Rigi | 189.3 | 94 | 12:00:41.18+32.72 s | – | – |