LA ROCHE-EN-ARDENNE (BE)
Quarry blast29 May 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 16:26:362020-05-29
- UTC
- 14:26:362020-05-29
Main parameters
| Date and time | 2020-05-29 14:26:36 UTC 2020-05-29 16:26:36 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.209° N, 5.608° E Uncertainty ± 0.8 km |
| Event ID | ROB 10140 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-29 17:02:48 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
- 27.9 – 73.5km
- Mean velocity, P wave
- 5.6km/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 0.31 s. S wave: 7 measurements, root-mean-square deviation 0.56 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 | 27.9 | 258 | 14:26:40.71+4.43 s | 14:26:45.31+9.03 s | 4.60 |
| CLAClavier | 31.9 | 317 | 14:26:41.69+5.41 s | 14:26:46.19+9.91 s | 4.50 |
| HOUHouvegnez | 32.5 | 60 | 14:26:41.96+5.68 s | – | – |
| KLBKalborn | 37.8 | 109 | 14:26:42.88+6.60 s | 14:26:47.49+11.21 s | 4.61 |
| GESGesves | 42.0 | 298 | 14:26:43.56+7.28 s | 14:26:49.63+13.35 s | 6.07 |
| VIAVianden | 52.3 | 125 | 14:26:45.47+9.19 s | – | – |
| MEMHMembach | 52.8 | 33 | 14:26:45.70+9.42 s | 14:26:52.30+16.02 s | 6.60 |
| MRDMaredsous | 60.8 | 280 | 14:26:47.17+10.89 s | 14:26:54.60+18.32 s | 7.43 |
| DOUDourbes | 73.5 | 260 | 14:26:48.36+12.08 s | 14:27:00.31+24.03 s | 11.95 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 65.8 | 20 | 14:26:47.99+11.71 s | – | – |