LA ROCHE-EN-ARDENNE (BE)
Quarry blast11 March 2022
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 15:26:412022-03-11
- UTC
- 14:26:412022-03-11
Main parameters
| Date and time | 2022-03-11 14:26:41 UTC 2022-03-11 15:26:41 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.188° N, 5.604° E Uncertainty ± 0.7 km |
| Event ID | ROB 15635 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-03-16 09:39:30 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
- 27.2 – 72.9km
- Mean velocity, P wave
- 6.0km/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: 10 measurements, root-mean-square deviation 0.22 s. S wave: 5 measurements, root-mean-square deviation 0.31 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)9 stations | |||||
| RCHRochefort | 27.2 | 262 | 14:26:46.51+4.69 s | 14:26:50.50+8.68 s | 3.99 |
| CLAClavier | 33.5 | 320 | 14:26:47.65+5.83 s | 14:26:52.37+10.55 s | 4.72 |
| HOUHouvegnez | 34.0 | 57 | 14:26:47.81+5.99 s | – | – |
| KLBKalborn | 37.4 | 105 | 14:26:48.73+6.91 s | 14:26:53.26+11.44 s | 4.53 |
| GESGesves | 42.8 | 301 | 14:26:49.33+7.51 s | – | – |
| MRGMont Rigi | 49.1 | 43 | 14:26:50.78+8.96 s | – | – |
| MEMHMembach | 55.0 | 32 | 14:26:51.42+9.60 s | 14:26:57.72+15.90 s | 6.30 |
| MEMSMembach | 55.0 | 32 | 14:26:51.54+9.72 s | 14:26:58.10+16.28 s | 6.56 |
| DOUDourbes | 72.9 | 262 | 14:26:54.40+12.58 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 68.1 | 20 | 14:26:54.02+12.20 s | – | – |