ROCHEFORT (BE)
Quarry blast6 May 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:54:182020-05-06
- UTC
- 11:54:182020-05-06
Main parameters
| Date and time | 2020-05-06 11:54:18 UTC 2020-05-06 13:54:18 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.099° N, 5.142° E Uncertainty ± 0.6 km |
| Event ID | ROB 9975 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-06 14:53:42 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
- 8.8 – 92.9km
- Mean velocity, P wave
- 5.7km/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: 10 measurements, root-mean-square deviation 0.56 s. S wave: 6 measurements, root-mean-square deviation 0.37 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 | |||||
| RCHRochefort | 8.8 | 44 | 11:54:20.20+1.29 s | 11:54:22.53+3.62 s | 2.33 |
| GESGesves | 32.1 | 353 | 11:54:24.72+5.81 s | 11:54:28.94+10.03 s | 4.22 |
| MRDMaredsous | 35.0 | 310 | 11:54:25.27+6.36 s | 11:54:29.53+10.62 s | 4.26 |
| DOUDourbes | 39.1 | 270 | 11:54:25.81+6.90 s | 11:54:31.04+12.13 s | 5.23 |
| LCHLa Chartreuse | 68.4 | 28 | 11:54:30.16+11.25 s | – | – |
| KLBKalborn | 69.2 | 89 | 11:54:31.16+12.25 s | – | – |
| MRGMont Rigi | 80.8 | 55 | 11:54:32.84+13.93 s | – | – |
| MEMSMembach | 83.9 | 47 | 11:54:34.73+15.82 s | 11:54:43.69+24.78 s | 8.96 |
| MEMHMembach | 83.9 | 47 | 11:54:34.73+15.82 s | 11:54:43.69+24.78 s | 8.96 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 92.9 | 37 | 11:54:35.76+16.85 s | – | – |