TOURNAI (BE)
Quarry blast14 July 2023
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 13:00:542023-07-14
- UTC
- 11:00:542023-07-14
Main parameters
| Date and time | 2023-07-14 11:00:54 UTC 2023-07-14 13:00:54 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.597° N, 3.435° E Uncertainty ± 18.1 km |
| Event ID | ROB 19935 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-07-17 08:31:29 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
- 31.5 – 77.0km
- Mean velocity, P wave
- 6.6km/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 0.15 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 | 31.5 | 66 | 11:00:59.91+5.85 s | 11:01:03.80+9.74 s | 3.89 |
| SKQSteenkerque | 46.0 | 83 | 11:01:02.14+8.08 s | 11:01:08.15+14.09 s | 6.01 |
| BRQBracquegnies | 51.4 | 104 | 11:01:03.33+9.27 s | 11:01:09.75+15.69 s | 6.42 |
| SNFSeneffe | 60.9 | 99 | 11:01:04.43+10.37 s | – | – |
| TGATangissart | 77.0 | 89 | 11:01:06.85+12.79 s | – | – |
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