TOURNAI (BE)
Quarry blast26 June 2023
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:00:122023-06-26
- UTC
- 11:00:122023-06-26
Main parameters
| Date and time | 2023-06-26 11:00:12 UTC 2023-06-26 13:00:12 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.658° N, 3.506° E Uncertainty ± 6.6 km |
| Event ID | ROB 19725 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-06-27 09:10:14 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
- 8
- Epicentral distance
- 24.6 – 116.2km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.5km/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: 8 measurements, root-mean-square deviation 0.35 s. S wave: 6 measurements, root-mean-square deviation 0.26 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)8 stations | |||||
| LESLessines | 24.6 | 76 | 11:00:17.57+5.18 s | 11:00:20.28+7.89 s | 2.71 |
| SKQSteenkerque | 40.6 | 91 | 11:00:19.52+7.13 s | 11:00:24.59+12.20 s | 5.07 |
| BRQBracquegnies | 48.8 | 114 | 11:00:20.97+8.58 s | 11:00:27.09+14.70 s | 6.12 |
| RQRRonquières | 51.2 | 96 | 11:00:20.95+8.56 s | 11:00:27.05+14.66 s | 6.10 |
| SNFSeneffe | 57.5 | 106 | 11:00:21.92+9.53 s | 11:00:29.19+16.80 s | 7.27 |
| TGATangissart | 72.2 | 94 | 11:00:24.68+12.29 s | – | – |
| DOUDourbes | 99.6 | 129 | 11:00:29.76+17.37 s | 11:00:41.27+28.88 s | 11.51 |
| GESGesves | 116.2 | 105 | 11:00:32.25+19.86 s | – | – |