ANDENNE (BE)
Quarry blast24 February 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:43:152021-02-24
- UTC
- 13:43:152021-02-24
Main parameters
| Date and time | 2021-02-24 13:43:15 UTC 2021-02-24 14:43:15 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.507° N, 4.992° E Uncertainty ± 2.3 km |
| Event ID | ROB 12540 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-26 21:22:25 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
- 15.2 – 53.9km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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 0.49 s. S wave: 5 measurements, root-mean-square deviation 0.32 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 | |||||
| GESGesves | 15.2 | 154 | 13:43:18.51+2.61 s | 13:43:20.53+4.63 s | 2.02 |
| CLAClavier | 24.1 | 114 | 13:43:20.53+4.63 s | 13:43:24.12+8.22 s | 3.59 |
| MRDMaredsous | 27.8 | 215 | 13:43:20.93+5.03 s | 13:43:24.69+8.79 s | 3.76 |
| TGATangissart | 35.0 | 288 | 13:43:21.95+6.05 s | – | – |
| RCHRochefort | 42.6 | 157 | 13:43:22.40+6.50 s | 13:43:29.16+13.26 s | 6.76 |
| SNFSeneffe | 50.2 | 271 | 13:43:24.59+8.69 s | – | – |
| DOUDourbes | 53.9 | 212 | 13:43:26.05+10.15 s | 13:43:32.32+16.42 s | 6.27 |