ROCHEFORT (BE)
Quarry blast2 December 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:59:562020-12-02
- UTC
- 10:59:562020-12-02
Main parameters
| Date and time | 2020-12-02 10:59:56 UTC 2020-12-02 11:59:56 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.178° N, 5.220° E Uncertainty ± 1.4 km |
| Event ID | ROB 11455 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-12-02 23:06:00 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
- 2.6 – 64.2km
- Mean velocity, P wave
- 6.1km/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: 6 measurements, root-mean-square deviation 0.63 s. S wave: 6 measurements, root-mean-square deviation 0.44 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 | 2.6 | 169 | 10:59:57.10+0.45 s | 10:59:57.80+1.15 s | 0.70 |
| GESGesves | 24.9 | 338 | 11:00:01.42+4.77 s | 11:00:04.84+8.19 s | 3.42 |
| CLAClavier | 27.4 | 12 | 11:00:01.43+4.78 s | 11:00:05.18+8.53 s | 3.75 |
| MRDMaredsous | 35.0 | 293 | 11:00:01.39+4.74 s | 11:00:07.95+11.30 s | 6.56 |
| DOUDourbes | 45.6 | 259 | 11:00:05.11+8.46 s | 11:00:09.77+13.12 s | 4.66 |
| KLBKalborn | 64.2 | 97 | 11:00:07.46+10.81 s | 11:00:16.09+19.44 s | 8.63 |