TOURNAI (BE)
Quarry blast8 August 2023
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 13:01:332023-08-08
- UTC
- 11:01:332023-08-08
Main parameters
| Date and time | 2023-08-08 11:01:33 UTC 2023-08-08 13:01:33 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.653° N, 3.443° E Uncertainty ± 9.2 km |
| Event ID | ROB 20030 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-08-09 00:15:55 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
- 45.0 – 102.8km
- Mean velocity, P wave
- 5.8km/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: 7 measurements, root-mean-square deviation 0.18 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)7 stations | |||||
| SKQSteenkerque | 45.0 | 90 | 11:01:41.11+8.00 s | 11:01:46.30+13.19 s | 5.19 |
| BRQBracquegnies | 52.7 | 111 | 11:01:42.30+9.19 s | 11:01:49.12+16.01 s | 6.82 |
| RQRRonquières | 55.5 | 95 | 11:01:42.53+9.42 s | – | – |
| SNFSeneffe | 61.6 | 105 | 11:01:43.57+10.46 s | – | – |
| TGATangissart | 76.5 | 94 | 11:01:46.55+13.44 s | – | – |
| MRDMaredsous | 101.8 | 112 | 11:01:50.89+17.78 s | – | – |
| DOUDourbes | 102.8 | 127 | 11:01:50.72+17.61 s | 11:02:02.34+29.23 s | 11.62 |
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