WALSDORF (DE)
Quarry blast28 May 2018
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 10:18:222018-05-28
- UTC
- 08:18:222018-05-28
Main parameters
| Date and time | 2018-05-28 08:18:22 UTC 2018-05-28 10:18:22 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.274° N, 6.702° E Uncertainty ± 1.6 km |
| Event ID | ROB 6630 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-05-28 10:27:48 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
- 5
- Epicentral distance
- 46.5 – 124.7km
- Mean velocity, P wave
- 5.6km/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 0.52 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)4 stations | |||||
| KLBKalborn | 46.5 | 246 | 08:18:30.07+7.81 s | 08:18:36.05+13.79 s | 5.98 |
| VIAVianden | 52.0 | 224 | 08:18:31.94+9.68 s | 08:18:37.47+15.21 s | 5.53 |
| WLFWalferdange | 78.5 | 210 | 08:18:35.41+13.15 s | 08:18:45.22+22.96 s | 9.81 |
| LCHLa Chartreuse | 88.2 | 298 | 08:18:38.25+15.99 s | – | – |
| German Regional Seismic Network (BGR, Germany)1 station | |||||
| TNSTaunus Observatorium Kleiner Feldberg | 124.7 | 92 | 08:18:43.84+21.58 s | 08:18:59.59+37.33 s | 15.75 |