ANDENNE (BE)
Quarry blast24 April 2019
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:13:112019-04-24
- UTC
- 12:13:112019-04-24
Main parameters
| Date and time | 2019-04-24 12:13:11 UTC 2019-04-24 14:13:11 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.492° N, 4.990° E Uncertainty ± 1.2 km |
| Event ID | ROB 8070 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-04-24 14:20:47 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
- 10
- Epicentral distance
- 13.7 – 90.8km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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: 10 measurements, root-mean-square deviation 0.54 s. S wave: 9 measurements, root-mean-square deviation 0.51 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 | 13.7 | 150 | 12:13:13.83+2.34 s | 12:13:15.77+4.28 s | 1.94 |
| CLAClavier | 23.6 | 110 | 12:13:15.68+4.19 s | 12:13:19.14+7.65 s | 3.46 |
| MRDMaredsous | 26.4 | 217 | 12:13:16.24+4.75 s | 12:13:20.05+8.56 s | 3.81 |
| LCHLa Chartreuse | 46.1 | 69 | 12:13:18.42+6.93 s | 12:13:25.40+13.91 s | 6.98 |
| DOUDourbes | 52.3 | 213 | 12:13:21.05+9.56 s | 12:13:27.61+16.12 s | 6.56 |
| SKQSteenkerque | 66.8 | 286 | 12:13:22.29+10.80 s | 12:13:31.76+20.27 s | 9.47 |
| MEMHMembach | 73.4 | 79 | 12:13:24.27+12.78 s | 12:13:34.45+22.96 s | 10.18 |
| MEMSMembach | 73.4 | 79 | 12:13:24.34+12.85 s | – | – |
| KLBKalborn | 90.8 | 118 | 12:13:28.03+16.54 s | 12:13:37.96+26.47 s | 9.93 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.2 | 65 | 12:13:24.16+12.67 s | 12:13:34.31+22.82 s | 10.15 |