ROCHEFORT (BE)
Quarry blast16 November 2020
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 11:39:402020-11-16
- UTC
- 10:39:402020-11-16
Main parameters
| Date and time | 2020-11-16 10:39:40 UTC 2020-11-16 11:39:40 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.166° N, 5.240° E Uncertainty ± 0.8 km |
| Event ID | ROB 11315 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-18 08:30:46 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
- 4
- Epicentral distance
- 1.6 – 46.8km
- 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: 4 measurements, root-mean-square deviation 0.16 s. S wave: 4 measurements, root-mean-square deviation 0.21 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)4 stations | |||||
| RCHRochefort | 1.6 | 217 | 10:39:41.00+0.32 s | 10:39:41.31+0.63 s | 0.31 |
| GESGesves | 26.7 | 336 | 10:39:45.67+4.99 s | 10:39:49.34+8.66 s | 3.67 |
| CLAClavier | 28.5 | 9 | 10:39:45.83+5.15 s | 10:39:49.50+8.82 s | 3.67 |
| DOUDourbes | 46.8 | 260 | 10:39:48.74+8.06 s | 10:39:54.88+14.20 s | 6.14 |