TOURNAI (BE)
Quarry blast13 July 2022
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 13:00:242022-07-13
- UTC
- 11:00:242022-07-13
Main parameters
| Date and time | 2022-07-13 11:00:24 UTC 2022-07-13 13:00:24 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.635° N, 3.408° E Uncertainty ± 17.7 km |
| Event ID | ROB 16595 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-21 23:35:32 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
- 6
- Epicentral distance
- 31.9 – 78.9km
- Mean velocity, P wave
- 6.0km/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 0.15 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)6 stations | |||||
| LESLessines | 31.9 | 74 | 11:00:30.31+5.58 s | 11:00:34.69+9.96 s | 4.38 |
| SKQSteenkerque | 47.5 | 88 | 11:00:33.25+8.52 s | 11:00:39.10+14.37 s | 5.85 |
| BRQBracquegnies | 54.3 | 108 | 11:00:34.33+9.60 s | – | – |
| RQRRonquières | 57.9 | 93 | 11:00:34.97+10.24 s | – | – |
| SNFSeneffe | 63.5 | 102 | 11:00:35.59+10.86 s | – | – |
| TGATangissart | 78.9 | 92 | 11:00:38.21+13.48 s | – | – |
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