ROCHEFORT (BE)
Quarry blast23 August 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:22:542022-08-23
- UTC
- 10:22:542022-08-23
Main parameters
| Date and time | 2022-08-23 10:22:54 UTC 2022-08-23 12:22:54 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.187° N, 5.221° E Uncertainty ± 1.5 km |
| Event ID | ROB 16935 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-26 15:02:12 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
- 4
- Epicentral distance
- 3.6 – 45.9km
- 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: 4 measurements, root-mean-square deviation 0.15 s. S wave: 4 measurements, root-mean-square deviation 0.19 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)4 stations | |||||
| RCHRochefort | 3.6 | 173 | 10:22:55.11+0.61 s | 10:22:55.77+1.27 s | 0.66 |
| GESGesves | 24.0 | 337 | 10:22:59.14+4.64 s | 10:23:02.07+7.57 s | 2.93 |
| CLAClavier | 26.5 | 13 | 10:22:59.28+4.78 s | 10:23:02.86+8.36 s | 3.58 |
| DOUDourbes | 45.9 | 257 | 10:23:02.94+8.44 s | 10:23:08.20+13.70 s | 5.26 |