ANDENNE (BE)
Quarry blast25 July 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:47:292022-07-25
- UTC
- 11:47:292022-07-25
Main parameters
| Date and time | 2022-07-25 11:47:29 UTC 2022-07-25 13:47:29 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.489° N, 4.993° E Uncertainty ± 1.2 km |
| Event ID | ROB 16675 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-25 21:40:08 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
- 13.4 – 90.6km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.5km/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 0.43 s. S wave: 6 measurements, root-mean-square deviation 0.40 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 | |||||
| GESGesves | 13.4 | 150 | 11:47:32.40+2.42 s | 11:47:34.48+4.50 s | 2.08 |
| CLAClavier | 23.3 | 109 | 11:47:34.37+4.39 s | 11:47:38.06+8.08 s | 3.69 |
| MRDMaredsous | 26.2 | 218 | 11:47:34.95+4.97 s | 11:47:38.57+8.59 s | 3.62 |
| TGATangissart | 35.8 | 291 | 11:47:36.30+6.32 s | – | – |
| DOUDourbes | 52.2 | 213 | 11:47:38.39+8.41 s | 11:47:45.80+15.82 s | 7.41 |
| MEMHMembach | 73.3 | 79 | 11:47:42.90+12.92 s | – | – |
| KLBKalborn | 90.6 | 118 | 11:47:46.33+16.35 s | 11:47:56.34+26.36 s | 10.01 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.1 | 65 | 11:47:42.90+12.92 s | 11:47:51.34+21.36 s | 8.44 |