AISEMONT (BE)
Quarry blast27 September 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 12:30:242022-09-27
- UTC
- 10:30:242022-09-27
Main parameters
| Date and time | 2022-09-27 10:30:24 UTC 2022-09-27 12:30:24 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.424° N, 4.625° E Uncertainty ± 1.1 km |
| Event ID | ROB 17250 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-09-27 12:52:27 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
- 17.0 – 48.1km
- 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: 6 measurements, root-mean-square deviation 0.31 s. S wave: 6 measurements, root-mean-square deviation 0.34 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 | |||||
| MRDMaredsous | 17.0 | 143 | 10:30:27.42+2.53 s | 10:30:30.36+5.47 s | 2.94 |
| TGATangissart | 21.4 | 340 | 10:30:28.23+3.34 s | 10:30:31.65+6.76 s | 3.42 |
| SNFSeneffe | 26.1 | 292 | 10:30:29.78+4.89 s | 10:30:33.46+8.57 s | 3.68 |
| GESGesves | 33.1 | 97 | 10:30:31.02+6.13 s | 10:30:35.72+10.83 s | 4.70 |
| DOUDourbes | 36.7 | 183 | 10:30:31.60+6.71 s | 10:30:36.09+11.20 s | 4.49 |
| CLAClavier | 48.1 | 90 | 10:30:33.70+8.81 s | 10:30:39.59+14.70 s | 5.89 |