ANDENNE (BE)
Quarry blast26 November 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:34:362020-11-26
- UTC
- 13:34:362020-11-26
Main parameters
| Date and time | 2020-11-26 13:34:36 UTC 2020-11-26 14:34:36 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.487° N, 4.985° E Uncertainty ± 1.0 km |
| Event ID | ROB 11405 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-28 17:08:58 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
- 13.4 – 90.9km
- Mean velocity, P wave
- 5.8km/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: 7 measurements, root-mean-square deviation 0.35 s. S wave: 7 measurements, root-mean-square deviation 0.48 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)6 stations | |||||
| GESGesves | 13.4 | 147 | 13:34:38.89+2.43 s | 13:34:40.52+4.06 s | 1.63 |
| CLAClavier | 23.7 | 108 | 13:34:40.83+4.37 s | 13:34:44.14+7.68 s | 3.31 |
| RCHRochefort | 40.7 | 155 | 13:34:43.97+7.51 s | 13:34:48.36+11.90 s | 4.39 |
| DOUDourbes | 51.7 | 213 | 13:34:46.04+9.58 s | 13:34:52.13+15.67 s | 6.09 |
| MEMHMembach | 73.9 | 79 | 13:34:50.21+13.75 s | 13:34:58.88+22.42 s | 8.67 |
| KLBKalborn | 90.9 | 118 | 13:34:52.38+15.92 s | 13:35:02.23+25.77 s | 9.85 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.7 | 65 | 13:34:49.05+12.59 s | 13:34:58.13+21.67 s | 9.08 |