Germany
Quarry blast28 June 2018
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 12:24:432018-06-28
- UTC
- 10:24:432018-06-28
Main parameters
| Date and time | 2018-06-28 10:24:43 UTC 2018-06-28 12:24:43 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 49.987° N, 6.999° E Uncertainty ± 2.8 km |
| Event ID | ROB 6865 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-07-11 10:59:28 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
- 57.5 – 172.6km
- Mean velocity, P wave
- 5.4km/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: 7 measurements, root-mean-square deviation 0.59 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 | |||||
| VIAVianden | 57.5 | 264 | 10:24:53.38+9.51 s | – | – |
| KLBKalborn | 64.9 | 281 | 10:24:54.50+10.63 s | – | – |
| WLFWalferdange | 70.8 | 240 | 10:24:55.12+11.25 s | – | – |
| HOUHouvegnez | 81.9 | 300 | 10:24:58.93+15.06 s | 10:25:08.56+24.69 s | 9.63 |
| MRGMont Rigi | 87.9 | 312 | 10:24:59.20+15.33 s | – | – |
| MEMSMembach | 98.7 | 315 | 10:25:00.15+16.28 s | 10:25:12.72+28.85 s | 12.57 |
| CLAClavier | 130.3 | 292 | 10:25:05.99+22.12 s | 10:25:20.72+36.85 s | 14.73 |
| GESGesves | 143.5 | 289 | 10:25:07.55+23.68 s | 10:25:25.25+41.38 s | 17.70 |
| OPTOpitter | 158.0 | 323 | 10:25:10.48+26.61 s | – | – |
| MRDMaredsous | 163.2 | 283 | 10:25:11.17+27.30 s | – | – |
| DOUDourbes | 172.6 | 275 | 10:25:12.31+28.44 s | 10:25:33.17+49.30 s | 20.86 |
| German Regional Seismic Network (BGR, Germany)1 station | |||||
| TNSTaunus Observatorium Kleiner Feldberg | 106.9 | 75 | 10:25:02.70+18.83 s | 10:25:15.52+31.65 s | 12.82 |