ANDENNE (BE)
Quarry blast24 November 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:24:362021-11-24
- UTC
- 13:24:362021-11-24
Main parameters
| Date and time | 2021-11-24 13:24:36 UTC 2021-11-24 14:24:36 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.511° N, 4.992° E Uncertainty ± 1.1 km |
| Event ID | ROB 14850 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-26 13:59:41 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
- 24.3 – 91.8km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.5km/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 0.61 s. S wave: 8 measurements, root-mean-square deviation 0.75 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 | |||||
| CLAClavier | 24.3 | 115 | 13:24:41.44+4.49 s | 13:24:44.88+7.93 s | 3.44 |
| MRDMaredsous | 28.2 | 214 | 13:24:42.06+5.11 s | – | – |
| TGATangissart | 34.9 | 288 | 13:24:42.09+5.14 s | 13:24:47.99+11.04 s | 5.90 |
| RCHRochefort | 43.0 | 157 | 13:24:44.56+7.61 s | 13:24:50.04+13.09 s | 5.48 |
| LCHLa Chartreuse | 45.3 | 71 | 13:24:44.41+7.46 s | 13:24:51.04+14.09 s | 6.63 |
| SNFSeneffe | 50.2 | 270 | 13:24:45.32+8.37 s | 13:24:52.86+15.91 s | 7.54 |
| SKQSteenkerque | 66.4 | 284 | 13:24:48.07+11.12 s | 13:24:57.27+20.32 s | 9.20 |
| HOUHouvegnez | 74.1 | 103 | 13:24:50.10+13.15 s | 13:24:59.19+22.24 s | 9.09 |
| KLBKalborn | 91.8 | 119 | 13:24:53.69+16.74 s | 13:25:02.33+25.38 s | 8.64 |