COUSOLRE (FR)
Quarry blast27 January 2023
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 09:45:212023-01-27
- UTC
- 08:45:212023-01-27
Main parameters
| Date and time | 2023-01-27 08:45:21 UTC 2023-01-27 09:45:21 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.197° N, 4.128° E Uncertainty ± 6.8 km |
| Event ID | ROB 18540 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-01-30 12:18:31 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
- 24.1 – 151.3km
- Mean velocity, P wave
- 5.5km/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: 5 measurements, root-mean-square deviation 0.23 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | |||||
| BLRGBlaregnies | 24.1 | 317 | 08:45:25.74+4.32 s | 08:45:28.98+7.56 s | 3.24 |
| DOUDourbes | 35.3 | 109 | 08:45:27.18+5.76 s | – | – |
| BDHNBois d'Haine | 35.6 | 10 | 08:45:27.52+6.10 s | – | – |
| MRDMaredsous | 47.1 | 75 | 08:45:29.37+7.95 s | 08:45:35.35+13.93 s | 5.98 |
| CLAClavier | 87.2 | 73 | 08:45:37.08+15.66 s | – | – |
| KLBKalborn | 142.0 | 94 | 08:45:45.48+24.06 s | 08:46:01.73+40.31 s | 16.25 |
| VIAVianden | 151.3 | 100 | 08:45:47.50+26.08 s | – | – |