ROCHEFORT (BE)
Quarry blast4 November 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 12:39:252022-11-04
- UTC
- 11:39:252022-11-04
Main parameters
| Date and time | 2022-11-04 11:39:25 UTC 2022-11-04 12:39:25 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.167° N, 5.258° E Uncertainty ± 0.5 km |
| Event ID | ROB 17625 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:37:49 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
- 2.6 – 91.9km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.3km/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 0.21 s. S wave: 6 measurements, root-mean-square deviation 0.16 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)7 stations | |||||
| RCHRochefort | 2.6 | 238 | 11:39:26.22+0.40 s | 11:39:26.70+0.88 s | 0.48 |
| GESGesves | 27.1 | 333 | 11:39:30.83+5.01 s | 11:39:34.39+8.57 s | 3.56 |
| CLAClavier | 28.2 | 6 | 11:39:30.70+4.88 s | 11:39:34.65+8.83 s | 3.95 |
| MRDMaredsous | 38.0 | 293 | 11:39:32.90+7.08 s | 11:39:37.48+11.66 s | 4.58 |
| DOUDourbes | 48.1 | 261 | 11:39:34.28+8.46 s | 11:39:40.63+14.81 s | 6.35 |
| KLBKalborn | 61.3 | 97 | 11:39:36.48+10.66 s | 11:39:44.30+18.48 s | 7.82 |
| MRGMont Rigi | 69.6 | 56 | 11:39:38.10+12.28 s | – | – |
| Bensberg seismic network (University of Cologne, Germany)1 station | |||||
| KLLKalltalsperre | 91.9 | 54 | 11:39:42.49+16.67 s | – | – |