ANDENNE (BE)
Quarry blast17 June 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:46:002021-06-17
- UTC
- 11:46:002021-06-17
Main parameters
| Date and time | 2021-06-17 11:46:00 UTC 2021-06-17 13:46:00 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.514° N, 4.988° E Uncertainty ± 1.1 km |
| Event ID | ROB 13675 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-18 11:13:56 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
- 16.0 – 92.2km
- Mean velocity, P wave
- 5.7km/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 0.43 s. S wave: 7 measurements, root-mean-square deviation 0.49 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)8 stations | |||||
| GESGesves | 16.0 | 154 | 11:46:03.37+2.73 s | 11:46:05.32+4.68 s | 1.95 |
| CLAClavier | 24.6 | 115 | 11:46:05.18+4.54 s | 11:46:08.77+8.13 s | 3.59 |
| MRDMaredsous | 28.3 | 214 | 11:46:05.84+5.20 s | 11:46:10.20+9.56 s | 4.36 |
| RCHRochefort | 43.4 | 157 | 11:46:08.17+7.53 s | 11:46:13.68+13.04 s | 5.51 |
| DOUDourbes | 54.4 | 211 | 11:46:10.58+9.94 s | 11:46:16.63+15.99 s | 6.05 |
| RQRRonquières | 55.1 | 281 | 11:46:10.06+9.42 s | – | – |
| HOUHouvegnez | 74.4 | 103 | 11:46:14.94+14.30 s | – | – |
| KLBKalborn | 92.2 | 120 | 11:46:17.32+16.68 s | 11:46:27.37+26.73 s | 10.05 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 72.3 | 67 | 11:46:13.36+12.72 s | 11:46:22.12+21.48 s | 8.76 |