NAMUR (BE)
Quarry blast27 July 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:46:252022-07-27
- UTC
- 11:46:252022-07-27
Main parameters
| Date and time | 2022-07-27 11:46:25 UTC 2022-07-27 13:46:25 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.497° N, 4.967° E Uncertainty ± 1.7 km |
| Event ID | ROB 16695 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-08 11:11:25 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
- 7
- Epicentral distance
- 15.1 – 92.5km
- Mean velocity, P wave
- 5.8km/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: 7 measurements, root-mean-square deviation 0.35 s. S wave: 5 measurements, root-mean-square deviation 0.89 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 | 15.1 | 146 | 11:46:28.11+2.49 s | 11:46:30.13+4.51 s | 2.02 |
| CLAClavier | 25.3 | 110 | 11:46:29.99+4.37 s | 11:46:33.49+7.87 s | 3.50 |
| MRDMaredsous | 25.9 | 213 | 11:46:30.47+4.85 s | – | – |
| TGATangissart | 33.8 | 291 | 11:46:31.70+6.08 s | 11:46:35.90+10.28 s | 4.20 |
| MEMHMembach | 74.9 | 80 | 11:46:38.11+12.49 s | 11:46:48.80+23.18 s | 10.69 |
| MRGMont Rigi | 78.6 | 88 | 11:46:39.65+14.03 s | 11:46:47.12+21.50 s | 7.47 |
| KLBKalborn | 92.5 | 118 | 11:46:42.25+16.63 s | – | – |