LONTZEN (BE)
Quarry blast10 August 2021
- Magnitude
- 0.6ML
- Depth
- –
- Belgian time
- 15:02:012021-08-10
- UTC
- 13:02:012021-08-10
Main parameters
| Date and time | 2021-08-10 13:02:01 UTC 2021-08-10 15:02:01 Belgian time |
|---|---|
| Magnitude | ML 0.6 |
| Epicentral coordinates | 50.653° N, 6.011° E Uncertainty ± 1.1 km |
| Event ID | ROB 14220 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-08-12 11:30:03 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
- 8
- Epicentral distance
- 4.9 – 29.2km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.6km/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: 8 measurements, root-mean-square deviation 0.22 s. S wave: 6 measurements, root-mean-square deviation 0.24 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 | |||||
| MEMHMembach | 4.9 | 181 | 13:02:02.62+0.88 s | 13:02:03.54+1.80 s | 0.92 |
| MEMSMembach | 4.9 | 181 | 13:02:02.67+0.93 s | 13:02:03.66+1.92 s | 0.99 |
| TNLTernell | 11.3 | 132 | 13:02:04.22+2.48 s | 13:02:05.10+3.36 s | 0.88 |
| MRGMont Rigi | 16.5 | 164 | 13:02:04.65+2.91 s | 13:02:06.51+4.77 s | 1.86 |
| EBNEben-Emael | 28.4 | 304 | 13:02:06.72+4.98 s | 13:02:09.87+8.13 s | 3.15 |
| LCHLa Chartreuse | 29.2 | 267 | 13:02:07.05+5.31 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 13.5 | 336 | 13:02:04.51+2.77 s | 13:02:06.38+4.64 s | 1.87 |
| TERZTerziet | 13.7 | 327 | 13:02:04.67+2.93 s | – | – |