LA ROCHE-EN-ARDENNE (BE)
Quarry blast29 September 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 15:46:112020-09-29
- UTC
- 13:46:112020-09-29
Main parameters
| Date and time | 2020-09-29 13:46:11 UTC 2020-09-29 15:46:11 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.205° N, 5.589° E Uncertainty ± 0.7 km |
| Event ID | ROB 10960 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-29 18:43:02 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
- 9
- Epicentral distance
- 26.5 – 72.1km
- Mean velocity, P wave
- 6.0km/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: 9 measurements, root-mean-square deviation 0.20 s. S wave: 7 measurements, root-mean-square deviation 0.30 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 | 26.5 | 258 | 13:46:16.54+4.87 s | 13:46:19.72+8.05 s | 3.18 |
| CLAClavier | 31.4 | 319 | 13:46:17.55+5.88 s | 13:46:21.99+10.32 s | 4.44 |
| HOUHouvegnez | 34.0 | 61 | 13:46:17.69+6.02 s | – | – |
| KLBKalborn | 38.9 | 107 | 13:46:18.72+7.05 s | 13:46:23.44+11.77 s | 4.72 |
| GESGesves | 41.0 | 299 | 13:46:19.13+7.46 s | 13:46:23.89+12.22 s | 4.76 |
| MRGMont Rigi | 48.5 | 45 | 13:46:20.33+8.66 s | 13:46:26.06+14.39 s | 5.73 |
| VIAVianden | 53.1 | 124 | 13:46:21.41+9.74 s | 13:46:27.79+16.12 s | 6.38 |
| MEMHMembach | 54.0 | 33 | 13:46:20.79+9.12 s | 13:46:28.04+16.37 s | 7.25 |
| DOUDourbes | 72.1 | 261 | 13:46:24.23+12.56 s | – | – |