ATH (BE)
Quarry blast19 October 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:30:422022-10-19
- UTC
- 10:30:422022-10-19
Main parameters
| Date and time | 2022-10-19 10:30:42 UTC 2022-10-19 12:30:42 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.666° N, 3.828° E Uncertainty ± 8.9 km |
| Event ID | ROB 17430 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-10-22 18:57:44 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
- 17.9 – 174.0km
- 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: 6 measurements, root-mean-square deviation 0.37 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | 17.9 | 96 | 10:30:46.34+3.78 s | – | – |
| RQRRonquières | 28.9 | 103 | 10:30:48.74+6.18 s | – | – |
| BRQBracquegnies | 30.0 | 133 | 10:30:47.72+5.16 s | – | – |
| SNFSeneffe | 36.6 | 118 | 10:30:48.93+6.37 s | 10:30:53.17+10.61 s | 4.24 |
| TGATangissart | 49.6 | 98 | 10:30:51.15+8.59 s | – | – |
| DOUDourbes | 83.7 | 139 | 10:30:56.43+13.87 s | 10:31:08.12+25.56 s | 11.69 |
| KLBKalborn | 174.0 | 110 | 10:31:10.75+28.19 s | – | – |