LA ROCHE-EN-ARDENNE (BE)
Quarry blast29 June 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:49:532021-06-29
- UTC
- 11:49:532021-06-29
Main parameters
| Date and time | 2021-06-29 11:49:53 UTC 2021-06-29 13:49:53 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.186° N, 5.601° E Uncertainty ± 0.6 km |
| Event ID | ROB 13865 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-07-06 17:04:46 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
- 7
- Epicentral distance
- 26.9 – 72.6km
- Mean velocity, P wave
- 6.1km/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: 7 measurements, root-mean-square deviation 0.16 s. S wave: 7 measurements, root-mean-square deviation 0.20 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)7 stations | |||||
| RCHRochefort | 26.9 | 263 | 11:49:58.46+4.75 s | 11:50:02.02+8.31 s | 3.56 |
| CLAClavier | 33.5 | 321 | 11:49:59.53+5.82 s | 11:50:04.29+10.58 s | 4.76 |
| HOUHouvegnez | 34.3 | 57 | 11:49:59.86+6.15 s | 11:50:04.54+10.83 s | 4.68 |
| KLBKalborn | 37.6 | 105 | 11:50:00.68+6.97 s | 11:50:05.20+11.49 s | 4.52 |
| GESGesves | 42.8 | 301 | 11:50:01.21+7.50 s | 11:50:07.04+13.33 s | 5.83 |
| MRGMont Rigi | 49.4 | 43 | 11:50:02.35+8.64 s | 11:50:08.44+14.73 s | 6.09 |
| DOUDourbes | 72.6 | 262 | 11:50:06.34+12.63 s | 11:50:15.43+21.72 s | 9.09 |