OLNE (BE)
Quarry blast1 December 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:40:442022-12-01
- UTC
- 12:40:442022-12-01
Main parameters
| Date and time | 2022-12-01 12:40:44 UTC 2022-12-01 13:40:44 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.592° N, 5.716° E Uncertainty ± 0.7 km |
| Event ID | ROB 17925 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-12-02 09:59:44 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
- 10
- Epicentral distance
- 9.9 – 97.1km
- Mean velocity, P wave
- 5.7km/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: 10 measurements, root-mean-square deviation 0.21 s. S wave: 7 measurements, root-mean-square deviation 0.34 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 | |||||
| LCHLa Chartreuse | 9.9 | 302 | 12:40:46.64+1.68 s | 12:40:48.07+3.11 s | 1.43 |
| STISart Tilman | 10.8 | 265 | 12:40:46.78+1.82 s | – | – |
| EBNEben-Emael | 23.0 | 353 | 12:40:49.20+4.24 s | 12:40:52.84+7.88 s | 3.64 |
| MRGMont Rigi | 26.9 | 109 | 12:40:49.96+5.00 s | 12:40:53.11+8.15 s | 3.15 |
| CLAClavier | 35.1 | 237 | 12:40:51.28+6.32 s | 12:40:56.35+11.39 s | 5.07 |
| MRDMaredsous | 74.7 | 245 | 12:40:57.73+12.77 s | – | – |
| DOUDourbes | 97.1 | 236 | 12:41:02.34+17.38 s | – | – |
| Dutch seismic network (KNMI)3 stations | |||||
| TERZTerziet | 22.8 | 36 | 12:40:49.23+4.27 s | 12:40:52.78+7.82 s | 3.55 |
| HGNHeimansgroeve | 24.5 | 38 | 12:40:49.55+4.59 s | 12:40:53.13+8.17 s | 3.58 |
| VKBValkenburg | 31.0 | 9 | 12:40:50.69+5.73 s | 12:40:54.81+9.85 s | 4.12 |