HILLESHEIM (DE)
Quarry blast2 August 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:52:272021-08-02
- UTC
- 09:52:272021-08-02
Main parameters
| Date and time | 2021-08-02 09:52:27 UTC 2021-08-02 11:52:27 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.292° N, 6.664° E Uncertainty ± 2.0 km |
| Event ID | ROB 14160 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-08-06 18:24:15 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
- 45.0 – 149.4km
- Mean velocity, P wave
- 6.0km/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 0.08 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 | 45.0 | 242 | 09:52:35.75+7.93 s | 09:52:41.70+13.88 s | 5.95 |
| HOUHouvegnez | 47.4 | 279 | 09:52:36.04+8.22 s | 09:52:42.51+14.69 s | 6.47 |
| MRGMont Rigi | 48.5 | 300 | 09:52:36.43+8.61 s | – | – |
| DOUDourbes | 149.4 | 262 | 09:52:53.51+25.69 s | 09:53:12.78+44.96 s | 19.27 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.9 | 316 | 09:52:40.55+12.73 s | 09:52:48.35+20.53 s | 7.80 |