ROCHEFORT (BE)
Quarry blast28 July 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 12:25:082022-07-28
- UTC
- 10:25:082022-07-28
Main parameters
| Date and time | 2022-07-28 10:25:08 UTC 2022-07-28 12:25:08 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.169° N, 5.256° E Uncertainty ± 1.2 km |
| Event ID | ROB 16700 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-08 11:11:48 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
- 8
- Epicentral distance
- 2.6 – 77.6km
- 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: 8 measurements, root-mean-square deviation 0.37 s. S wave: 5 measurements, root-mean-square deviation 0.32 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)8 stations | |||||
| RCHRochefort | 2.6 | 234 | 10:25:08.40+0.32 s | 10:25:09.01+0.93 s | 0.61 |
| GESGesves | 26.9 | 333 | 10:25:13.07+4.99 s | 10:25:16.36+8.28 s | 3.29 |
| CLAClavier | 28.1 | 7 | 10:25:13.15+5.07 s | 10:25:16.77+8.69 s | 3.62 |
| DOUDourbes | 48.0 | 260 | 10:25:16.22+8.14 s | 10:25:23.09+15.01 s | 6.87 |
| HOUHouvegnez | 57.2 | 69 | 10:25:18.18+10.10 s | – | – |
| KLBKalborn | 61.4 | 97 | 10:25:18.57+10.49 s | 10:25:26.20+18.12 s | 7.63 |
| MEMHMembach | 72.6 | 47 | 10:25:21.79+13.71 s | – | – |
| TNLTernell | 77.6 | 53 | 10:25:21.96+13.88 s | – | – |