ANDENNE (BE)
Quarry blast1 June 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:47:002021-06-01
- UTC
- 11:47:002021-06-01
Main parameters
| Date and time | 2021-06-01 11:47:00 UTC 2021-06-01 13:47:00 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.513° N, 5.021° E Uncertainty ± 3.7 km |
| Event ID | ROB 13800 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-29 16:37:04 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
- 6
- Epicentral distance
- 14.9 – 68.3km
- Mean velocity, P wave
- 6.5km/s
- Mean velocity, S wave
- 3.7km/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: 6 measurements, root-mean-square deviation 0.28 s. S wave: 6 measurements, root-mean-square deviation 0.51 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)6 stations | |||||
| GESGesves | 14.9 | 162 | 11:47:03.00+2.90 s | 11:47:04.66+4.56 s | 1.66 |
| CLAClavier | 22.5 | 117 | 11:47:04.71+4.61 s | 11:47:06.98+6.88 s | 2.27 |
| MRDMaredsous | 29.5 | 218 | 11:47:05.38+5.28 s | 11:47:09.03+8.93 s | 3.65 |
| TGATangissart | 36.8 | 286 | 11:47:06.54+6.44 s | 11:47:11.06+10.96 s | 4.52 |
| DOUDourbes | 55.5 | 213 | 11:47:09.98+9.88 s | 11:47:16.69+16.59 s | 6.71 |
| SKQSteenkerque | 68.3 | 283 | 11:47:11.21+11.11 s | 11:47:18.47+18.37 s | 7.26 |