TOURNAI (BE)
Quarry blast17 January 2022
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:05:302022-01-17
- UTC
- 12:05:302022-01-17
Main parameters
| Date and time | 2022-01-17 12:05:30 UTC 2022-01-17 13:05:30 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.645° N, 3.373° E Uncertainty ± 9.5 km |
| Event ID | ROB 15185 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-18 11:36:53 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
- 50.0 – 203.8km
- Mean velocity, P wave
- 5.0km/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 0.55 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 | 50.0 | 89 | 12:05:38.73+8.59 s | 12:05:45.52+15.38 s | 6.79 |
| BRQBracquegnies | 57.0 | 108 | 12:05:40.05+9.91 s | – | – |
| RQRRonquières | 60.4 | 94 | 12:05:39.56+9.42 s | – | – |
| BDHNBois d'Haine | 61.4 | 104 | 12:05:39.67+9.53 s | – | – |
| SNFSeneffe | 66.2 | 103 | 12:05:41.23+11.09 s | 12:05:50.45+20.31 s | 9.22 |
| TGATangissart | 81.4 | 93 | 12:05:44.85+14.71 s | 12:05:54.54+24.40 s | 9.69 |
| GESGesves | 124.9 | 103 | 12:05:52.92+22.78 s | 12:06:06.43+36.29 s | 13.51 |
| MEMSMembach | 186.6 | 90 | 12:06:00.28+30.14 s | – | – |
| MEMHMembach | 186.6 | 90 | 12:06:00.36+30.22 s | – | – |
| KLBKalborn | 203.8 | 106 | 12:06:03.15+33.01 s | – | – |