Germany
Quarry blast11 April 2017
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 13:12:012017-04-11
- UTC
- 11:12:012017-04-11
Main parameters
| Date and time | 2017-04-11 11:12:01 UTC 2017-04-11 13:12:01 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 49.592° N, 6.613° E Uncertainty ± 4.0 km |
| Event ID | ROB 5671 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-04-11 14:38:03 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
- 34.3 – 155.6km
- Mean velocity, P wave
- 5.2km/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: 4 measurements, root-mean-square deviation 0.12 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)10 stations | |||||
| WLFWalferdange | 34.3 | 284 | 11:12:06.51+4.86 s | 11:12:11.58+9.93 s | 5.07 |
| HOUHouvegnez | 95.3 | 333 | 11:12:18.12+16.47 s | 11:12:29.81+28.16 s | 11.69 |
| MRGMont Rigi | 109.3 | 340 | 11:12:20.61+18.96 s | 11:12:32.17+30.52 s | 11.56 |
| RCHRochefort | 117.7 | 303 | 11:12:22.54+20.89 s | – | – |
| MEMSMembach | 121.1 | 339 | 11:12:21.99+20.34 s | 11:12:37.38+35.73 s | 15.39 |
| MEMHMembach | 121.1 | 339 | 11:12:22.23+20.58 s | 11:12:37.45+35.80 s | 15.22 |
| CLAClavier | 131.5 | 315 | 11:12:24.16+22.51 s | – | – |
| GESGesves | 140.6 | 309 | 11:12:25.51+23.86 s | 11:12:41.87+40.22 s | 16.36 |
| MRDMaredsous | 154.2 | 302 | 11:12:27.01+25.36 s | – | – |
| DOUDourbes | 155.6 | 292 | 11:12:27.87+26.22 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 139.2 | 340 | 11:12:24.58+22.93 s | – | – |
| German Regional Seismic Network (BGR, Germany)1 station | |||||
| TNSTaunus Observatorium Kleiner Feldberg | 149.3 | 61 | 11:12:26.34+24.69 s | 11:12:44.84+43.19 s | 18.50 |