ROCHEFORT (BE)
Quarry blast4 May 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 14:15:022022-05-04
- UTC
- 12:15:022022-05-04
Main parameters
| Date and time | 2022-05-04 12:15:02 UTC 2022-05-04 14:15:02 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.129° N, 5.129° E Uncertainty ± 1.5 km |
| Event ID | ROB 16075 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-05-08 13:55:06 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
- 7.6 – 70.2km
- Mean velocity, P wave
- 5.5km/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: 7 measurements, root-mean-square deviation 0.26 s. S wave: 4 measurements, root-mean-square deviation 0.23 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 | 7.6 | 68 | 12:15:03.55+0.91 s | 12:15:04.75+2.11 s | 1.20 |
| GESGesves | 28.6 | 354 | 12:15:08.09+5.45 s | – | – |
| MRDMaredsous | 32.2 | 307 | 12:15:08.68+6.04 s | 12:15:12.87+10.23 s | 4.19 |
| CLAClavier | 34.5 | 21 | 12:15:08.74+6.10 s | 12:15:13.07+10.43 s | 4.33 |
| DOUDourbes | 38.4 | 265 | 12:15:09.18+6.54 s | 12:15:14.25+11.61 s | 5.07 |
| TGATangissart | 68.3 | 321 | 12:15:14.87+12.23 s | – | – |
| KLBKalborn | 70.2 | 92 | 12:15:15.13+12.49 s | – | – |