ROCHEFORT (BE)
Quarry blast24 January 2019
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 12:21:432019-01-24
- UTC
- 11:21:432019-01-24
Main parameters
| Date and time | 2019-01-24 11:21:43 UTC 2019-01-24 12:21:43 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.179° N, 5.250° E Uncertainty ± 0.8 km |
| Event ID | ROB 7705 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-24 12:45:09 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
- 15
- Epicentral distance
- 3.1 – 116.1km
- Mean velocity, P wave
- 5.6km/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: 15 measurements, root-mean-square deviation 0.27 s. S wave: 10 measurements, root-mean-square deviation 0.27 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)15 stations | |||||
| RCHRochefort | 3.1 | 212 | 11:21:43.39+0.37 s | 11:21:44.12+1.10 s | 0.73 |
| GESGesves | 25.7 | 333 | 11:21:47.52+4.50 s | 11:21:50.81+7.79 s | 3.29 |
| CLAClavier | 27.0 | 8 | 11:21:47.46+4.44 s | 11:21:51.29+8.27 s | 3.83 |
| MRDMaredsous | 37.0 | 292 | 11:21:49.22+6.20 s | 11:21:54.21+11.19 s | 4.99 |
| DOUDourbes | 47.7 | 259 | 11:21:51.17+8.15 s | 11:21:57.34+14.32 s | 6.17 |
| HOUHouvegnez | 57.3 | 70 | 11:21:53.14+10.12 s | – | – |
| KLBKalborn | 62.1 | 98 | 11:21:53.63+10.61 s | – | – |
| MRGMont Rigi | 69.4 | 58 | 11:21:55.04+12.02 s | – | – |
| MEMSMembach | 72.2 | 48 | 11:21:55.45+12.43 s | – | – |
| MEMHMembach | 72.2 | 48 | 11:21:55.77+12.75 s | 11:22:03.97+20.95 s | 8.20 |
| EBNEben-Emael | 75.2 | 24 | 11:21:56.80+13.78 s | – | – |
| WLFWalferdange | 86.4 | 131 | 11:21:58.37+15.35 s | 11:22:08.64+25.62 s | 10.27 |
| UCCBUccle | 93.4 | 318 | 11:22:00.03+17.01 s | 11:22:10.67+27.65 s | 10.64 |
| SKQSteenkerque | 98.2 | 303 | 11:22:00.16+17.14 s | 11:22:12.47+29.45 s | 12.31 |
| LESLessines | 116.1 | 301 | 11:22:03.86+20.84 s | 11:22:17.88+34.86 s | 14.02 |