ROCHEFORT (BE)
Quarry blast18 November 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 13:27:122022-11-18
- UTC
- 12:27:122022-11-18
Main parameters
| Date and time | 2022-11-18 12:27:12 UTC 2022-11-18 13:27:12 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.180° N, 5.252° E Uncertainty ± 0.7 km |
| Event ID | ROB 17775 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:47:18 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
- 3.3 – 61.9km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.5km/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 0.12 s. S wave: 5 measurements, root-mean-square deviation 0.35 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 | 3.3 | 213 | 12:27:13.34+0.63 s | 12:27:14.07+1.36 s | 0.73 |
| GESGesves | 25.7 | 333 | 12:27:17.47+4.76 s | – | – |
| CLAClavier | 26.8 | 8 | 12:27:17.62+4.91 s | 12:27:21.41+8.70 s | 3.79 |
| MRDMaredsous | 37.1 | 292 | 12:27:19.29+6.58 s | 12:27:23.59+10.88 s | 4.30 |
| DOUDourbes | 47.9 | 259 | 12:27:21.13+8.42 s | 12:27:26.47+13.76 s | 5.34 |
| KLBKalborn | 61.9 | 98 | 12:27:23.47+10.76 s | 12:27:31.17+18.46 s | 7.70 |