ROCHEFORT (BE)
Quarry blast30 January 2019
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:22:332019-01-30
- UTC
- 11:22:332019-01-30
Main parameters
| Date and time | 2019-01-30 11:22:33 UTC 2019-01-30 12:22:33 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.177° N, 5.247° E Uncertainty ± 0.6 km |
| Event ID | ROB 7760 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-31 13:52:40 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
- 7
- Epicentral distance
- 2.9 – 62.2km
- Mean velocity, P wave
- 5.9km/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: 7 measurements, root-mean-square deviation 0.27 s. S wave: 6 measurements, root-mean-square deviation 0.16 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)7 stations | |||||
| RCHRochefort | 2.9 | 210 | 11:22:33.83+0.63 s | 11:22:34.15+0.95 s | 0.32 |
| GESGesves | 25.8 | 334 | 11:22:37.77+4.57 s | 11:22:41.40+8.20 s | 3.63 |
| CLAClavier | 27.2 | 8 | 11:22:38.49+5.29 s | 11:22:41.59+8.39 s | 3.10 |
| MRDMaredsous | 36.9 | 292 | 11:22:40.22+7.02 s | 11:22:44.56+11.36 s | 4.34 |
| DOUDourbes | 47.5 | 259 | 11:22:41.85+8.65 s | 11:22:47.45+14.25 s | 5.60 |
| LCHLa Chartreuse | 57.1 | 26 | 11:22:42.94+9.74 s | – | – |
| KLBKalborn | 62.2 | 98 | 11:22:44.00+10.80 s | 11:22:51.89+18.69 s | 7.89 |