HASTIERE (BE)
Quarry blast14 June 2018
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:02:102018-06-14
- UTC
- 11:02:102018-06-14
Main parameters
| Date and time | 2018-06-14 11:02:10 UTC 2018-06-14 13:02:10 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.181° N, 4.826° E Uncertainty ± 0.8 km |
| Event ID | ROB 6775 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-14 15:23:38 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
- 12
- Epicentral distance
- 14.1 – 222.1km
- Mean velocity, P wave
- 6.0km/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: 10 measurements, root-mean-square deviation 0.29 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)11 stations | |||||
| MRDMaredsous | 14.1 | 343 | 11:02:13.04+2.72 s | 11:02:15.00+4.68 s | 1.96 |
| DOUDourbes | 19.1 | 240 | 11:02:13.93+3.61 s | 11:02:16.56+6.24 s | 2.63 |
| GESGesves | 29.4 | 39 | 11:02:15.98+5.66 s | – | – |
| CLAClavier | 43.0 | 52 | 11:02:17.93+7.61 s | – | – |
| SKQSteenkerque | 74.3 | 315 | 11:02:23.02+12.70 s | – | – |
| UCCSUccle | 76.1 | 334 | 11:02:22.85+12.53 s | – | – |
| KLBKalborn | 92.2 | 95 | 11:02:26.24+15.92 s | – | – |
| MEMSMembach | 96.7 | 60 | 11:02:26.74+16.42 s | – | – |
| WLFWalferdange | 111.2 | 121 | 11:02:29.13+18.81 s | – | – |
| MOLTMol | 116.4 | 9 | 11:02:30.69+20.37 s | – | – |
| ZEVZevekote | 172.8 | 309 | 11:02:39.01+28.69 s | – | – |
| Network BUG1 station | |||||
| BUGBochum | 222.1 | 50 | 11:02:44.91+34.59 s | – | – |