ROCHEFORT (BE)
Quarry blast22 January 2019
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 12:06:222019-01-22
- UTC
- 11:06:222019-01-22
Main parameters
| Date and time | 2019-01-22 11:06:22 UTC 2019-01-22 12:06:22 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.193° N, 5.242° E Uncertainty ± 1.6 km |
| Event ID | ROB 7690 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-23 12:18:02 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
- 4.4 – 55.7km
- Mean velocity, P wave
- 5.8km/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: 6 measurements, root-mean-square deviation 0.31 s. S wave: 5 measurements, root-mean-square deviation 0.23 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 | 4.4 | 194 | 11:06:23.53+0.78 s | 11:06:24.19+1.44 s | 0.66 |
| GESGesves | 24.0 | 333 | 11:06:27.26+4.51 s | 11:06:30.35+7.60 s | 3.09 |
| CLAClavier | 25.5 | 10 | 11:06:27.96+5.21 s | 11:06:30.91+8.16 s | 2.95 |
| MRDMaredsous | 35.9 | 290 | 11:06:28.89+6.14 s | 11:06:33.43+10.68 s | 4.54 |
| DOUDourbes | 47.5 | 257 | 11:06:31.45+8.70 s | 11:06:37.49+14.74 s | 6.04 |
| LCHLa Chartreuse | 55.7 | 27 | 11:06:32.41+9.66 s | – | – |