ROCKESKYLL (DE)
Quarry blast26 February 2018
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 12:30:272018-02-26
- UTC
- 11:30:272018-02-26
Main parameters
| Date and time | 2018-02-26 11:30:27 UTC 2018-02-26 12:30:27 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.254° N, 6.698° E Uncertainty ± 3.1 km |
| Event ID | ROB 6370 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-02-26 13:03:19 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
- 9
- Epicentral distance
- 45.4 – 151.2km
- Mean velocity, P wave
- 5.8km/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 0.19 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)8 stations | |||||
| KLBKalborn | 45.4 | 248 | 11:30:34.82+7.49 s | 11:30:40.67+13.34 s | 5.85 |
| VIAVianden | 50.2 | 225 | 11:30:35.54+8.21 s | – | – |
| HOUHouvegnez | 50.6 | 283 | 11:30:35.96+8.63 s | – | – |
| MEMSMembach | 62.8 | 309 | 11:30:38.06+10.73 s | 11:30:45.66+18.33 s | 7.60 |
| WLFWalferdange | 76.4 | 211 | 11:30:40.62+13.29 s | 11:30:49.84+22.51 s | 9.22 |
| GESGesves | 115.6 | 278 | 11:30:46.92+19.59 s | – | – |
| OPTOpitter | 121.4 | 322 | 11:30:48.00+20.67 s | – | – |
| DOUDourbes | 151.2 | 264 | 11:30:52.16+24.83 s | – | – |
| German Regional Seismic Network (BGR, Germany)1 station | |||||
| TNSTaunus Observatorium Kleiner Feldberg | 124.9 | 91 | 11:30:48.60+21.27 s | – | – |