ROCHEFORT (BE)
Quarry blast1 February 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:10:492022-02-01
- UTC
- 12:10:492022-02-01
Main parameters
| Date and time | 2022-02-01 12:10:49 UTC 2022-02-01 13:10:49 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.097° N, 5.098° E Uncertainty ± 0.9 km |
| Event ID | ROB 15335 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-07 09:23:56 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
- 5
- Epicentral distance
- 11.3 – 38.7km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.2km/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: 5 measurements, root-mean-square deviation 0.23 s. S wave: 4 measurements, root-mean-square deviation 0.13 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)5 stations | |||||
| RCHRochefort | 11.3 | 55 | 12:10:51.58+1.91 s | 12:10:53.30+3.63 s | 1.72 |
| GESGesves | 32.1 | 359 | 12:10:55.71+6.04 s | 12:10:59.74+10.07 s | 4.03 |
| MRDMaredsous | 32.8 | 314 | 12:10:55.93+6.26 s | 12:10:59.74+10.07 s | 3.81 |
| DOUDourbes | 36.0 | 270 | 12:10:55.93+6.26 s | 12:11:00.66+10.99 s | 4.73 |
| CLAClavier | 38.7 | 22 | 12:10:57.01+7.34 s | – | – |