AMAY (BE)
Quarry blast4 September 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:27:402020-09-04
- UTC
- 12:27:402020-09-04
Main parameters
| Date and time | 2020-09-04 12:27:40 UTC 2020-09-04 14:27:40 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.565° N, 5.341° E Uncertainty ± 1.2 km |
| Event ID | ROB 10790 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-04 16:13:19 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
- 13
- Epicentral distance
- 16.4 – 75.2km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.2km/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: 13 measurements, root-mean-square deviation 0.42 s. S wave: 10 measurements, root-mean-square deviation 0.63 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)12 stations | |||||
| CLAClavier | 16.4 | 190 | 12:27:42.40+2.15 s | 12:27:45.26+5.01 s | 2.86 |
| LCHLa Chartreuse | 20.0 | 66 | 12:27:43.22+2.97 s | 12:27:47.51+7.26 s | 4.29 |
| GESGesves | 26.9 | 222 | 12:27:44.45+4.20 s | 12:27:48.99+8.74 s | 4.54 |
| EBNEben-Emael | 35.1 | 43 | 12:27:46.31+6.06 s | 12:27:51.33+11.08 s | 5.02 |
| RCHRochefort | 46.3 | 190 | 12:27:48.38+8.13 s | 12:27:54.93+14.68 s | 6.55 |
| MEMHMembach | 47.6 | 84 | 12:27:48.13+7.88 s | 12:27:54.89+14.64 s | 6.76 |
| MEMSMembach | 47.6 | 84 | 12:27:48.23+7.98 s | – | – |
| MRDMaredsous | 50.1 | 235 | 12:27:49.22+8.97 s | – | – |
| MRGMont Rigi | 52.4 | 96 | 12:27:49.03+8.78 s | 12:27:57.39+17.14 s | 8.36 |
| HOUHouvegnez | 52.6 | 116 | 12:27:49.41+9.16 s | 12:27:56.42+16.17 s | 7.01 |
| DOUDourbes | 74.5 | 226 | 12:27:54.01+13.76 s | 12:28:02.04+21.79 s | 8.03 |
| KLBKalborn | 75.2 | 133 | 12:27:53.17+12.92 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 47.3 | 62 | 12:27:47.98+7.73 s | 12:27:54.76+14.51 s | 6.78 |