DURBUY (BE)
Quarry blast16 September 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 14:35:292020-09-16
- UTC
- 12:35:292020-09-16
Main parameters
| Date and time | 2020-09-16 12:35:29 UTC 2020-09-16 14:35:29 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.359° N, 5.537° E Uncertainty ± 2.0 km |
| Event ID | ROB 10870 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-16 16:07:37 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
- 18.0 – 73.4km
- Mean velocity, P wave
- 5.3km/s
- Mean velocity, S wave
- 3.1km/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 0.81 s. S wave: 7 measurements, root-mean-square deviation 1.11 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 | |||||
| CLAClavier | 18.0 | 292 | 12:35:33.29+3.74 s | 12:35:34.44+4.89 s | 1.15 |
| LCHLa Chartreuse | 31.5 | 8 | 12:35:34.75+5.20 s | 12:35:38.16+8.61 s | 3.41 |
| RCHRochefort | 31.7 | 224 | 12:35:35.51+5.96 s | – | – |
| GESGesves | 32.2 | 275 | 12:35:35.48+5.93 s | 12:35:39.75+10.20 s | 4.27 |
| MEMHMembach | 43.6 | 50 | 12:35:39.06+9.51 s | 12:35:45.17+15.62 s | 6.11 |
| KLBKalborn | 49.9 | 125 | 12:35:37.70+8.15 s | 12:35:44.39+14.84 s | 6.69 |
| MRDMaredsous | 55.2 | 264 | 12:35:40.13+10.58 s | – | – |
| DOUDourbes | 73.4 | 247 | 12:35:42.03+12.48 s | 12:35:54.23+24.68 s | 12.20 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 53.0 | 32 | 12:35:39.73+10.18 s | 12:35:45.50+15.95 s | 5.77 |