ANDENNE (BE)
Quarry blast29 June 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 11:51:092021-06-29
- UTC
- 09:51:092021-06-29
Main parameters
| Date and time | 2021-06-29 09:51:09 UTC 2021-06-29 11:51:09 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.503° N, 4.976° E Uncertainty ± 0.8 km |
| Event ID | ROB 13860 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-07-06 17:04:18 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
- 15.3 – 92.3km
- Mean velocity, P wave
- 5.8km/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 0.22 s. S wave: 7 measurements, root-mean-square deviation 0.55 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 | |||||
| GESGesves | 15.3 | 149 | 09:51:11.32+2.31 s | 09:51:13.03+4.02 s | 1.71 |
| CLAClavier | 25.0 | 112 | 09:51:13.33+4.32 s | 09:51:16.93+7.92 s | 3.60 |
| MRDMaredsous | 26.8 | 214 | 09:51:13.86+4.85 s | 09:51:17.80+8.79 s | 3.94 |
| RCHRochefort | 42.6 | 155 | 09:51:16.49+7.48 s | 09:51:22.13+13.12 s | 5.64 |
| SNFSeneffe | 49.1 | 271 | 09:51:17.60+8.59 s | – | – |
| DOUDourbes | 52.9 | 211 | 09:51:18.39+9.38 s | 09:51:25.02+16.01 s | 6.63 |
| RQRRonquières | 54.4 | 282 | 09:51:18.44+9.43 s | – | – |
| MEMSMembach | 74.2 | 80 | 09:51:22.07+13.06 s | 09:51:31.16+22.15 s | 9.09 |
| KLBKalborn | 92.3 | 119 | 09:51:25.37+16.36 s | 09:51:35.48+26.47 s | 10.11 |