BIRRESBORN (DE)
Quarry blast17 October 2019
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 11:41:312019-10-17
- UTC
- 09:41:312019-10-17
Main parameters
| Date and time | 2019-10-17 09:41:31 UTC 2019-10-17 11:41:31 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.198° N, 6.651° E Uncertainty ± 2.3 km |
| Event ID | ROB 8765 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-10-17 11:54:33 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
- 9
- Epicentral distance
- 43.4 – 147.4km
- Mean velocity, P wave
- 5.6km/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 0.33 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)8 stations | |||||
| VIAVianden | 43.4 | 228 | 09:41:38.47+6.62 s | 09:41:44.29+12.44 s | 5.82 |
| MRGMont Rigi | 53.8 | 311 | 09:41:40.60+8.75 s | – | – |
| MEMHMembach | 64.6 | 315 | 09:41:42.63+10.78 s | 09:41:50.97+19.12 s | 8.34 |
| MEMSMembach | 64.6 | 315 | 09:41:42.78+10.93 s | – | – |
| CLAClavier | 99.2 | 285 | 09:41:48.10+16.25 s | – | – |
| RCHRochefort | 101.8 | 268 | 09:41:49.59+17.74 s | – | – |
| MRDMaredsous | 134.8 | 276 | 09:41:54.41+22.56 s | 09:42:11.52+39.67 s | 17.11 |
| DOUDourbes | 147.4 | 266 | 09:41:56.48+24.63 s | 09:42:15.21+43.36 s | 18.73 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 81.1 | 321 | 09:41:45.22+13.37 s | 09:41:56.30+24.45 s | 11.08 |