FLERON (BE)
Quarry blast20 May 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:17:492022-05-20
- UTC
- 11:17:492022-05-20
Main parameters
| Date and time | 2022-05-20 11:17:49 UTC 2022-05-20 13:17:49 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.625° N, 5.701° E Uncertainty ± 1.2 km |
| Event ID | ROB 18290 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-01-03 15:39:23 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
- 9
- Epicentral distance
- 7.4 – 37.1km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.0km/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: 9 measurements, root-mean-square deviation 0.41 s. S wave: 5 measurements, root-mean-square deviation 0.73 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 | |||||
| LCHLa Chartreuse | 7.4 | 282 | 11:17:50.39+1.22 s | – | – |
| MEMHMembach | 22.0 | 95 | 11:17:52.50+3.33 s | 11:17:56.39+7.22 s | 3.89 |
| MEMSMembach | 22.0 | 95 | 11:17:52.51+3.34 s | 11:17:56.08+6.91 s | 3.57 |
| TNLTernell | 30.7 | 98 | 11:17:53.97+4.80 s | – | – |
| CLAClavier | 36.4 | 231 | 11:17:56.05+6.88 s | – | – |
| HOUHouvegnez | 37.1 | 144 | 11:17:56.39+7.22 s | 11:18:00.41+11.24 s | 4.02 |
| Dutch seismic network (KNMI)3 stations | |||||
| TERZTerziet | 20.6 | 45 | 11:17:52.75+3.58 s | 11:17:56.67+7.50 s | 3.92 |
| HGNHeimansgroeve | 22.5 | 47 | 11:17:53.15+3.98 s | – | – |
| VKBValkenburg | 27.5 | 12 | 11:17:53.94+4.77 s | 11:17:59.24+10.07 s | 5.30 |