LA ROCHE-EN-ARDENNE (BE)
Quarry blast3 March 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 16:17:312021-03-03
- UTC
- 15:17:312021-03-03
Main parameters
| Date and time | 2021-03-03 15:17:31 UTC 2021-03-03 16:17:31 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.205° N, 5.599° E Uncertainty ± 0.9 km |
| Event ID | ROB 12670 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-04 08:35:56 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
- 14
- Epicentral distance
- 27.2 – 119.6km
- Mean velocity, P wave
- 6.7km/s
- Mean velocity, S wave
- 3.6km/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: 14 measurements, root-mean-square deviation 0.56 s. S wave: 10 measurements, root-mean-square deviation 0.64 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)13 stations | |||||
| RCHRochefort | 27.2 | 258 | 15:17:36.79+4.81 s | 15:17:40.32+8.34 s | 3.53 |
| CLAClavier | 31.9 | 318 | 15:17:37.87+5.89 s | 15:17:42.28+10.30 s | 4.41 |
| HOUHouvegnez | 33.3 | 60 | 15:17:37.99+6.01 s | 15:17:41.67+9.69 s | 3.68 |
| KLBKalborn | 38.3 | 108 | 15:17:39.05+7.07 s | 15:17:43.40+11.42 s | 4.35 |
| GESGesves | 41.6 | 299 | 15:17:39.44+7.46 s | 15:17:43.86+11.88 s | 4.42 |
| MRGMont Rigi | 48.0 | 45 | 15:17:40.59+8.61 s | 15:17:46.24+14.26 s | 5.65 |
| VIAVianden | 52.6 | 125 | 15:17:41.66+9.68 s | 15:17:47.76+15.78 s | 6.10 |
| MEMSMembach | 53.6 | 33 | 15:17:41.59+9.61 s | – | – |
| MEMHMembach | 53.6 | 33 | 15:17:41.62+9.64 s | 15:17:48.40+16.42 s | 6.78 |
| TNLTernell | 56.8 | 41 | 15:17:42.19+10.21 s | – | – |
| MRDMaredsous | 60.3 | 281 | 15:17:42.25+10.27 s | 15:17:49.89+17.91 s | 7.64 |
| DOUDourbes | 72.8 | 261 | 15:17:44.48+12.50 s | 15:17:54.85+22.87 s | 10.37 |
| BOUBougnies | 119.6 | 280 | 15:17:49.53+17.55 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 66.5 | 21 | 15:17:43.88+11.90 s | – | – |