ROCKESKYLL (DE)
Quarry blast9 October 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 12:40:022020-10-09
- UTC
- 10:40:022020-10-09
Main parameters
| Date and time | 2020-10-09 10:40:02 UTC 2020-10-09 12:40:02 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.264° N, 6.691° E Uncertainty ± 0.9 km |
| Event ID | ROB 11045 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-09 15:24:51 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
- 49.9 – 150.9km
- Mean velocity, P wave
- 8.2km/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 0.54 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 | |||||
| HOUHouvegnez | 49.9 | 282 | 10:40:10.85+8.14 s | – | – |
| VIAVianden | 50.6 | 224 | 10:40:11.11+8.40 s | 10:40:18.13+15.42 s | 7.02 |
| MEMSMembach | 61.7 | 309 | 10:40:11.60+8.89 s | – | – |
| MEMHMembach | 61.7 | 309 | 10:40:13.13+10.42 s | 10:40:21.57+18.86 s | 8.44 |
| DOUDourbes | 150.9 | 264 | 10:40:28.36+25.65 s | 10:40:47.62+44.91 s | 19.26 |