HILLESHEIM (DE)
Quarry blast8 April 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 11:24:202020-04-08
- UTC
- 09:24:202020-04-08
Main parameters
| Date and time | 2020-04-08 09:24:20 UTC 2020-04-08 11:24:20 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.299° N, 6.697° E Uncertainty ± 0.5 km |
| Event ID | ROB 9785 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-08 11:42:05 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
- 7
- Epicentral distance
- 47.4 – 151.8km
- Mean velocity, P wave
- 4.7km/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: 5 measurements, root-mean-square deviation 0.45 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)6 stations | |||||
| KLBKalborn | 47.4 | 242 | 09:24:29.22+8.44 s | 09:24:35.06+14.28 s | 5.84 |
| VIAVianden | 53.8 | 221 | 09:24:29.82+9.04 s | – | – |
| MEMSMembach | 59.7 | 306 | 09:24:30.74+9.96 s | 09:24:38.96+18.18 s | 8.22 |
| MEMHMembach | 59.7 | 306 | 09:24:30.83+10.05 s | 09:24:39.02+18.24 s | 8.19 |
| MRDMaredsous | 137.4 | 271 | 09:24:45.38+24.60 s | – | – |
| DOUDourbes | 151.8 | 262 | 09:24:46.51+25.73 s | 09:25:05.54+44.76 s | 19.03 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 74.9 | 314 | 09:24:34.94+14.16 s | – | – |