NIEDERFORSTBACH (DE)
Quarry blast19 May 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 10:11:182022-05-19
- UTC
- 08:11:182022-05-19
Main parameters
| Date and time | 2022-05-19 08:11:18 UTC 2022-05-19 10:11:18 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.730° N, 6.201° E Uncertainty ± 2.3 km |
| Event ID | ROB 16225 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-05-23 09:37:19 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
- 7.8 – 21.0km
- Mean velocity, P wave
- 6.6km/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: 7 measurements, root-mean-square deviation 0.12 s. S wave: 6 measurements, root-mean-square deviation 0.62 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)3 stations | |||||
| TNLTernell | 16.8 | 197 | 08:11:21.59+3.12 s | 08:11:24.00+5.53 s | 2.41 |
| MEMHMembach | 19.1 | 225 | 08:11:21.68+3.21 s | 08:11:24.15+5.68 s | 2.47 |
| MEMSMembach | 19.1 | 225 | 08:11:21.96+3.49 s | 08:11:23.12+4.65 s | 1.16 |
| Bensberg seismic network (University of Cologne, Germany)2 stations | |||||
| DREDreilägerbach | 7.8 | 163 | 08:11:20.03+1.56 s | 08:11:21.44+2.97 s | 1.41 |
| KLLKalltalsperre | 12.1 | 140 | 08:11:20.89+2.42 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 19.4 | 281 | 08:11:22.03+3.56 s | 08:11:24.58+6.11 s | 2.55 |
| TERZTerziet | 21.0 | 278 | 08:11:22.30+3.83 s | 08:11:25.67+7.20 s | 3.37 |