ANDENNE (BE)
Quarry blast18 April 2019
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:18:292019-04-18
- UTC
- 12:18:292019-04-18
Main parameters
| Date and time | 2019-04-18 12:18:29 UTC 2019-04-18 14:18:29 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.478° N, 4.995° E Uncertainty ± 1.5 km |
| Event ID | ROB 8055 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-04-18 15:44:25 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
- 9
- Epicentral distance
- 12.2 – 89.8km
- 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 0.41 s. S wave: 7 measurements, root-mean-square deviation 0.36 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)8 stations | |||||
| GESGesves | 12.2 | 148 | 12:18:31.85+2.10 s | 12:18:33.86+4.11 s | 2.01 |
| CLAClavier | 22.7 | 107 | 12:18:34.07+4.32 s | 12:18:37.28+7.53 s | 3.21 |
| MRDMaredsous | 25.4 | 220 | 12:18:34.35+4.60 s | 12:18:37.23+7.48 s | 2.88 |
| LCHLa Chartreuse | 46.4 | 67 | 12:18:37.86+8.11 s | 12:18:43.61+13.86 s | 5.75 |
| DOUDourbes | 51.3 | 214 | 12:18:39.07+9.32 s | 12:18:45.61+15.86 s | 6.54 |
| MEMSMembach | 73.4 | 78 | 12:18:42.96+13.21 s | – | – |
| MEMHMembach | 73.4 | 78 | 12:18:43.01+13.26 s | 12:18:51.62+21.87 s | 8.61 |
| KLBKalborn | 89.8 | 117 | 12:18:46.17+16.42 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.5 | 64 | 12:18:41.83+12.08 s | 12:18:51.15+21.40 s | 9.32 |