NAMUR (BE)
Quarry blast26 October 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:34:432022-10-26
- UTC
- 12:34:432022-10-26
Main parameters
| Date and time | 2022-10-26 12:34:43 UTC 2022-10-26 14:34:43 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.483° N, 4.975° E Uncertainty ± 1.7 km |
| Event ID | ROB 17530 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-10-27 13:12:37 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
- 5
- Epicentral distance
- 13.5 – 71.4km
- Mean velocity, P wave
- 6.1km/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: 5 measurements, root-mean-square deviation 0.48 s. S wave: 5 measurements, root-mean-square deviation 0.54 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)4 stations | |||||
| GESGesves | 13.5 | 144 | 12:34:46.28+2.61 s | 12:34:48.31+4.64 s | 2.03 |
| CLAClavier | 24.3 | 107 | 12:34:48.13+4.46 s | 12:34:51.09+7.42 s | 2.96 |
| MRDMaredsous | 25.0 | 216 | 12:34:47.17+3.50 s | 12:34:52.71+9.04 s | 5.54 |
| TGATangissart | 34.9 | 293 | 12:34:49.53+5.86 s | 12:34:54.50+10.83 s | 4.97 |
| Dutch seismic network (KNMI)1 station | |||||
| VKBValkenburg | 71.4 | 53 | 12:34:56.17+12.50 s | 12:35:05.32+21.65 s | 9.15 |