ENGIS (BE)
Quarry blast28 September 2018
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 12:02:262018-09-28
- UTC
- 10:02:262018-09-28
Main parameters
| Date and time | 2018-09-28 10:02:26 UTC 2018-09-28 12:02:26 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.591° N, 5.408° E Uncertainty ± 0.7 km |
| Event ID | ROB 7235 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-10-10 15:42:14 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
- 11
- Epicentral distance
- 14.5 – 116.0km
- Mean velocity, P wave
- 5.7km/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: 11 measurements, root-mean-square deviation 0.28 s. S wave: 6 measurements, root-mean-square deviation 0.09 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)11 stations | |||||
| LCHLa Chartreuse | 14.5 | 68 | 10:02:29.25+2.83 s | – | – |
| CLAClavier | 20.5 | 202 | 10:02:29.83+3.41 s | 10:02:32.88+6.46 s | 3.05 |
| GESGesves | 32.3 | 225 | 10:02:32.28+5.86 s | 10:02:36.18+9.76 s | 3.90 |
| MEMSMembach | 42.6 | 87 | 10:02:33.92+7.50 s | – | – |
| MRGMont Rigi | 48.1 | 100 | 10:02:34.97+8.55 s | 10:02:40.79+14.37 s | 5.82 |
| HOUHouvegnez | 49.9 | 122 | 10:02:35.43+9.01 s | 10:02:41.39+14.97 s | 5.96 |
| MRDMaredsous | 55.7 | 235 | 10:02:36.50+10.08 s | 10:02:43.20+16.78 s | 6.70 |
| KLBKalborn | 73.9 | 137 | 10:02:39.59+13.17 s | – | – |
| DOUDourbes | 79.9 | 227 | 10:02:41.08+14.66 s | 10:02:50.48+24.06 s | 9.40 |
| BRQBracquegnies | 91.0 | 263 | 10:02:41.90+15.48 s | – | – |
| WLFWalferdange | 116.0 | 152 | 10:02:46.75+20.33 s | – | – |