FLERINGEN (DE)
Quarry blast27 August 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 11:38:322020-08-27
- UTC
- 09:38:322020-08-27
Main parameters
| Date and time | 2020-08-27 09:38:32 UTC 2020-08-27 11:38:32 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.191° N, 6.503° E Uncertainty ± 2.0 km |
| Event ID | ROB 10750 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-08-27 22:33:13 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
- 8
- Epicentral distance
- 30.0 – 136.8km
- Mean velocity, P wave
- 5.8km/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: 7 measurements, root-mean-square deviation 0.18 s. S wave: 4 measurements, root-mean-square deviation 0.29 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)7 stations | |||||
| KLBKalborn | 30.0 | 250 | 09:38:38.03+5.22 s | 09:38:42.19+9.38 s | 4.16 |
| VIAVianden | 35.8 | 217 | 09:38:39.12+6.31 s | 09:38:44.10+11.29 s | 4.98 |
| HOUHouvegnez | 39.9 | 297 | 09:38:39.63+6.82 s | – | – |
| MRGMont Rigi | 46.8 | 320 | 09:38:41.03+8.22 s | 09:38:46.69+13.88 s | 5.66 |
| MEMHMembach | 58.2 | 323 | 09:38:43.37+10.56 s | 09:38:50.12+17.31 s | 6.75 |
| RCHRochefort | 91.3 | 268 | 09:38:48.70+15.89 s | – | – |
| DOUDourbes | 136.8 | 266 | 09:38:56.28+23.47 s | 09:39:13.85+41.04 s | 17.57 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 75.5 | 328 | 09:38:46.03+13.22 s | – | – |