LESSINES (BE)
Quarry blast17 June 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 10:42:362022-06-17
- UTC
- 08:42:362022-06-17
Main parameters
| Date and time | 2022-06-17 08:42:36 UTC 2022-06-17 10:42:36 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.722° N, 3.857° E Uncertainty ± 6.1 km |
| Event ID | ROB 16375 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-06-17 15:35:02 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
- 10
- Epicentral distance
- 1.6 – 152.7km
- Mean velocity, P wave
- 5.4km/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: 8 measurements, root-mean-square deviation 0.24 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)9 stations | |||||
| LESLessines | 1.6 | 218 | 08:42:36.82+0.22 s | – | – |
| SKQSteenkerque | 17.7 | 117 | 08:42:39.46+2.86 s | – | – |
| RQRRonquières | 29.1 | 116 | 08:42:41.23+4.63 s | – | – |
| BRQBracquegnies | 33.3 | 144 | 08:42:42.41+5.81 s | – | – |
| UCCBUccle | 36.4 | 77 | 08:42:43.14+6.54 s | – | – |
| SNFSeneffe | 38.3 | 128 | 08:42:42.93+6.33 s | 08:42:48.02+11.42 s | 5.09 |
| DOUDourbes | 87.3 | 143 | 08:42:52.64+16.04 s | 08:43:02.78+26.18 s | 10.14 |
| CLAClavier | 107.8 | 108 | 08:42:56.31+19.71 s | 08:43:08.57+31.97 s | 12.26 |
| MEMHMembach | 152.7 | 94 | 08:43:02.28+25.68 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 146.5 | 87 | 08:43:01.52+24.92 s | – | – |