CONSTHUM (LU)
Quarry blast9 July 2018
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 17:32:382018-07-09
- UTC
- 15:32:382018-07-09
Main parameters
| Date and time | 2018-07-09 15:32:38 UTC 2018-07-09 17:32:38 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 49.987° N, 6.047° E Uncertainty ± 0.5 km |
| Event ID | ROB 6940 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-07-11 11:06:59 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
- 12.5 – 104.7km
- Mean velocity, P wave
- 6.3km/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 0.64 s. S wave: 4 measurements, root-mean-square deviation 0.25 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 | |||||
| VIAVianden | 12.5 | 117 | 15:32:40.51+2.41 s | 15:32:42.48+4.38 s | 1.97 |
| KLBKalborn | 13.3 | 19 | 15:32:40.93+2.83 s | 15:32:43.10+5.00 s | 2.17 |
| WLFWalferdange | 36.7 | 168 | 15:32:44.57+6.47 s | 15:32:49.56+11.46 s | 4.99 |
| HOUHouvegnez | 41.0 | 356 | 15:32:45.11+7.01 s | 15:32:50.69+12.59 s | 5.58 |
| MEMSMembach | 69.3 | 358 | 15:32:48.28+10.18 s | – | – |
| DOUDourbes | 104.7 | 277 | 15:32:56.01+17.91 s | – | – |