HILLESHEIM (DE)
Quarry blast8 April 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 11:23:272020-04-08
- UTC
- 09:23:272020-04-08
Main parameters
| Date and time | 2020-04-08 09:23:27 UTC 2020-04-08 11:23:27 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.258° N, 6.643° E Uncertainty ± 0.5 km |
| Event ID | ROB 9780 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-08 11:41:53 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
- 6
- Epicentral distance
- 42.0 – 147.4km
- Mean velocity, P wave
- 5.7km/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 0.06 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)5 stations | |||||
| KLBKalborn | 42.0 | 246 | 09:23:35.01+7.21 s | 09:23:40.53+12.73 s | 5.52 |
| VIAVianden | 47.8 | 221 | 09:23:35.99+8.19 s | 09:23:42.85+15.05 s | 6.86 |
| MEMHMembach | 59.6 | 311 | 09:23:38.15+10.35 s | 09:23:45.57+17.77 s | 7.42 |
| MEMSMembach | 59.6 | 311 | 09:23:38.21+10.41 s | – | – |
| DOUDourbes | 147.4 | 264 | 09:23:52.73+24.93 s | 09:24:12.20+44.40 s | 19.47 |
| Dutch seismic network (KNMI)1 station | |||||
| VKBValkenburg | 91.1 | 318 | 09:23:43.55+15.75 s | – | – |