ROCHEFORT (BE)
Quarry blast1 October 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 11:39:082020-10-01
- UTC
- 09:39:082020-10-01
Main parameters
| Date and time | 2020-10-01 09:39:08 UTC 2020-10-01 11:39:08 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.181° N, 5.239° E Uncertainty ± 1.0 km |
| Event ID | ROB 11310 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-18 08:30:19 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
- 5
- Epicentral distance
- 3.0 – 47.0km
- Mean velocity, P wave
- 5.7km/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: 5 measurements, root-mean-square deviation 0.14 s. S wave: 4 measurements, root-mean-square deviation 0.10 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)5 stations | |||||
| RCHRochefort | 3.0 | 197 | 09:39:08.76+0.44 s | 09:39:09.40+1.08 s | 0.64 |
| GESGesves | 25.2 | 335 | 09:39:13.01+4.69 s | 09:39:16.29+7.97 s | 3.28 |
| CLAClavier | 26.9 | 10 | 09:39:13.25+4.93 s | – | – |
| MRDMaredsous | 36.2 | 292 | 09:39:14.79+6.47 s | 09:39:19.39+11.07 s | 4.60 |
| DOUDourbes | 47.0 | 259 | 09:39:16.55+8.23 s | 09:39:22.75+14.43 s | 6.20 |