LESSINES (BE)
Quarry blast18 November 2022
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:00:142022-11-18
- UTC
- 10:00:142022-11-18
Main parameters
| Date and time | 2022-11-18 10:00:14 UTC 2022-11-18 11:00:14 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.731° N, 3.866° E Uncertainty ± 2.5 km |
| Event ID | ROB 17760 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:46:47 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
- 12
- Epicentral distance
- 2.7 – 174.2km
- Mean velocity, P wave
- 5.5km/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: 7 measurements, root-mean-square deviation 0.44 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)11 stations | |||||
| LESLessines | 2.7 | 216 | 10:00:15.08+0.67 s | 10:00:15.26+0.85 s | 0.18 |
| SKQSteenkerque | 17.7 | 121 | 10:00:17.73+3.32 s | 10:00:19.36+4.95 s | 1.63 |
| RQRRonquières | 28.9 | 119 | 10:00:19.42+5.01 s | – | – |
| BRQBracquegnies | 33.7 | 145 | 10:00:20.57+6.16 s | – | – |
| SNFSeneffe | 38.4 | 129 | 10:00:21.21+6.80 s | 10:00:26.46+12.05 s | 5.25 |
| DOUDourbes | 87.7 | 143 | 10:00:29.63+15.22 s | – | – |
| GESGesves | 94.7 | 113 | 10:00:32.46+18.05 s | – | – |
| MEMSMembach | 152.2 | 94 | 10:00:39.55+25.14 s | – | – |
| HOUHouvegnez | 157.3 | 105 | 10:00:40.40+25.99 s | 10:01:00.55+46.14 s | 20.15 |
| MRGMont Rigi | 158.2 | 98 | 10:00:40.78+26.37 s | 10:01:00.60+46.19 s | 19.82 |
| KLBKalborn | 174.2 | 113 | 10:00:42.91+28.50 s | – | – |
| Bensberg seismic network (University of Cologne, Germany)1 station | |||||
| KLLKalltalsperre | 173.1 | 92 | 10:00:43.48+29.07 s | 10:01:03.96+49.55 s | 20.48 |