ROCHEFORT (BE)
Quarry blast1 September 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:09:142020-09-01
- UTC
- 10:09:142020-09-01
Main parameters
| Date and time | 2020-09-01 10:09:14 UTC 2020-09-01 12:09:14 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.179° N, 5.245° E Uncertainty ± 0.2 km |
| Event ID | ROB 10760 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-02 09:29:41 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
- 2.9 – 81.3km
- 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: 9 measurements, root-mean-square deviation 0.16 s. S wave: 5 measurements, root-mean-square deviation 0.11 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 | |||||
| RCHRochefort | 2.9 | 206 | 10:09:14.56+0.45 s | 10:09:15.18+1.07 s | 0.62 |
| GESGesves | 25.5 | 334 | 10:09:18.84+4.73 s | 10:09:22.21+8.10 s | 3.37 |
| CLAClavier | 27.0 | 9 | 10:09:19.05+4.94 s | – | – |
| MRDMaredsous | 36.7 | 292 | 10:09:20.92+6.81 s | 10:09:25.37+11.26 s | 4.45 |
| DOUDourbes | 47.4 | 259 | 10:09:22.43+8.32 s | 10:09:28.53+14.42 s | 6.10 |
| KLBKalborn | 62.4 | 98 | 10:09:24.90+10.79 s | 10:09:32.92+18.81 s | 8.02 |
| MRGMont Rigi | 69.7 | 58 | 10:09:26.20+12.09 s | – | – |
| TGATangissart | 69.9 | 313 | 10:09:26.18+12.07 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 81.3 | 37 | 10:09:28.17+14.06 s | – | – |