ROCHEFORT (BE)
Quarry blast4 November 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:03:292020-11-04
- UTC
- 11:03:292020-11-04
Main parameters
| Date and time | 2020-11-04 11:03:29 UTC 2020-11-04 12:03:29 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.175° N, 5.219° E Uncertainty ± 1.3 km |
| Event ID | ROB 11255 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-04 14:21:47 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
- 6
- Epicentral distance
- 2.3 – 68.9km
- Mean velocity, P wave
- 6.2km/s
- Mean velocity, S wave
- 3.5km/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: 6 measurements, root-mean-square deviation 0.34 s. S wave: 6 measurements, root-mean-square deviation 0.64 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)6 stations | |||||
| RCHRochefort | 2.3 | 166 | 11:03:30.29+0.31 s | 11:03:30.94+0.96 s | 0.65 |
| GESGesves | 25.2 | 338 | 11:03:34.53+4.55 s | 11:03:37.97+7.99 s | 3.44 |
| CLAClavier | 27.8 | 12 | 11:03:34.93+4.95 s | 11:03:39.03+9.05 s | 4.10 |
| MRDMaredsous | 35.1 | 294 | 11:03:36.40+6.42 s | 11:03:41.04+11.06 s | 4.64 |
| DOUDourbes | 45.5 | 259 | 11:03:37.47+7.49 s | 11:03:44.08+14.10 s | 6.61 |
| TGATangissart | 68.9 | 314 | 11:03:41.92+11.94 s | 11:03:48.95+18.97 s | 7.03 |