TOURNAI (BE)
Quarry blast10 July 2023
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 13:00:202023-07-10
- UTC
- 11:00:202023-07-10
Main parameters
| Date and time | 2023-07-10 11:00:20 UTC 2023-07-10 13:00:20 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.630° N, 3.513° E Uncertainty ± 26.7 km |
| Event ID | ROB 19900 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-07-17 08:30:03 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
- 5
- Epicentral distance
- 25.0 – 56.2km
- Mean velocity, P wave
- 6.3km/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: 5 measurements, root-mean-square deviation 0.36 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)5 stations | |||||
| LESLessines | 25.0 | 69 | 11:00:25.00+4.79 s | – | – |
| SKQSteenkerque | 40.1 | 87 | 11:00:27.12+6.91 s | 11:00:32.22+12.01 s | 5.10 |
| BRQBracquegnies | 47.1 | 110 | 11:00:28.31+8.10 s | 11:00:34.93+14.72 s | 6.62 |
| RQRRonquières | 50.4 | 93 | 11:00:29.67+9.46 s | 11:00:35.69+15.48 s | 6.02 |
| SNFSeneffe | 56.2 | 103 | 11:00:29.57+9.36 s | – | – |
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