NAMUR (BE)
Quarry blast12 July 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:52:282022-07-12
- UTC
- 11:52:282022-07-12
Main parameters
| Date and time | 2022-07-12 11:52:28 UTC 2022-07-12 13:52:28 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.504° N, 4.969° E Uncertainty ± 1.5 km |
| Event ID | ROB 16585 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-21 23:33:32 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
- 15.6 – 92.8km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.1km/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 0.30 s. S wave: 4 measurements, root-mean-square deviation 0.45 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 | |||||
| GESGesves | 15.6 | 147 | 11:52:30.41+2.31 s | 11:52:32.10+4.00 s | 1.69 |
| CLAClavier | 25.5 | 112 | 11:52:32.44+4.34 s | 11:52:35.90+7.80 s | 3.46 |
| MRDMaredsous | 26.6 | 213 | 11:52:32.92+4.82 s | 11:52:36.83+8.73 s | 3.91 |
| TGATangissart | 33.6 | 290 | 11:52:33.99+5.89 s | 11:52:38.37+10.27 s | 4.38 |
| RCHRochefort | 42.9 | 155 | 11:52:35.66+7.56 s | – | – |
| MEMSMembach | 74.7 | 81 | 11:52:40.75+12.65 s | – | – |
| MEMHMembach | 74.7 | 81 | 11:52:41.74+13.64 s | – | – |
| KLBKalborn | 92.8 | 118 | 11:52:44.39+16.29 s | – | – |