ANDENNE (BE)
Quarry blast15 July 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:32:342021-07-15
- UTC
- 09:32:342021-07-15
Main parameters
| Date and time | 2021-07-15 09:32:34 UTC 2021-07-15 11:32:34 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.511° N, 4.979° E Uncertainty ± 0.5 km |
| Event ID | ROB 14010 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-07-26 12:01:36 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
- 5
- Epicentral distance
- 25.1 – 53.7km
- 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: 5 measurements, root-mean-square deviation 0.14 s. S wave: 5 measurements, root-mean-square deviation 0.15 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)5 stations | |||||
| CLAClavier | 25.1 | 114 | 09:32:38.44+4.40 s | 09:32:41.95+7.91 s | 3.51 |
| MRDMaredsous | 27.7 | 213 | 09:32:39.08+5.04 s | 09:32:42.89+8.85 s | 3.81 |
| TGATangissart | 34.1 | 288 | 09:32:40.09+6.05 s | 09:32:44.50+10.46 s | 4.41 |
| LCHLa Chartreuse | 46.2 | 72 | 09:32:42.33+8.29 s | 09:32:48.13+14.09 s | 5.80 |
| DOUDourbes | 53.7 | 211 | 09:32:43.74+9.70 s | 09:32:50.20+16.16 s | 6.46 |