LA ROCHE-EN-ARDENNE (BE)
Quarry blast22 February 2019
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 15:53:332019-02-22
- UTC
- 14:53:332019-02-22
Main parameters
| Date and time | 2019-02-22 14:53:33 UTC 2019-02-22 15:53:33 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.205° N, 5.597° E Uncertainty ± 0.5 km |
| Event ID | ROB 7850 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-02-22 16:07:27 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
- 13
- Epicentral distance
- 27.0 – 74.8km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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: 13 measurements, root-mean-square deviation 0.14 s. S wave: 12 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)11 stations | |||||
| RCHRochefort | 27.0 | 258 | 14:53:38.24+4.70 s | 14:53:41.57+8.03 s | 3.33 |
| CLAClavier | 31.7 | 319 | 14:53:39.33+5.79 s | 14:53:43.49+9.95 s | 4.16 |
| HOUHouvegnez | 33.5 | 60 | 14:53:39.40+5.86 s | 14:53:43.53+9.99 s | 4.13 |
| KLBKalborn | 38.4 | 108 | 14:53:40.42+6.88 s | 14:53:45.20+11.66 s | 4.78 |
| GESGesves | 41.5 | 299 | 14:53:41.01+7.47 s | 14:53:46.53+12.99 s | 5.52 |
| MRGMont Rigi | 48.1 | 45 | 14:53:42.03+8.49 s | 14:53:47.79+14.25 s | 5.76 |
| VIAVianden | 52.7 | 125 | 14:53:43.10+9.56 s | 14:53:49.34+15.80 s | 6.24 |
| MEMSMembach | 53.7 | 33 | 14:53:42.98+9.44 s | – | – |
| MEMHMembach | 53.7 | 33 | 14:53:43.06+9.52 s | 14:53:49.13+15.59 s | 6.07 |
| MRDMaredsous | 60.1 | 281 | 14:53:44.25+10.71 s | 14:53:51.71+18.17 s | 7.46 |
| DOUDourbes | 72.7 | 261 | 14:53:46.00+12.46 s | 14:53:55.06+21.52 s | 9.06 |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 66.5 | 21 | 14:53:45.32+11.78 s | 14:53:53.46+19.92 s | 8.14 |
| VKBValkenburg | 74.8 | 10 | 14:53:46.50+12.96 s | 14:53:56.71+23.17 s | 10.21 |