ROCHEFORT (BE)
Quarry blast31 August 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:12:532022-08-31
- UTC
- 10:12:532022-08-31
Main parameters
| Date and time | 2022-08-31 10:12:53 UTC 2022-08-31 12:12:53 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.163° N, 5.226° E Uncertainty ± 1.9 km |
| Event ID | ROB 16985 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-31 12:38:02 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
- 6
- Epicentral distance
- 1.0 – 74.6km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.1km/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: 6 measurements, root-mean-square deviation 0.52 s. S wave: 5 measurements, root-mean-square deviation 0.31 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 | |||||
| RCHRochefort | 1.0 | 174 | 10:12:53.17−0.29 s | 10:12:53.76+0.30 s | 0.59 |
| GESGesves | 26.5 | 338 | 10:12:57.91+4.45 s | 10:13:01.54+8.08 s | 3.63 |
| CLAClavier | 28.9 | 11 | 10:12:58.05+4.59 s | 10:13:01.95+8.49 s | 3.90 |
| MRDMaredsous | 36.1 | 295 | 10:12:58.25+4.79 s | 10:13:04.94+11.48 s | 6.69 |
| DOUDourbes | 45.7 | 261 | 10:13:01.31+7.85 s | 10:13:07.88+14.42 s | 6.57 |
| MEMHMembach | 74.6 | 48 | 10:13:06.72+13.26 s | – | – |