BASTOGNE (BE)
Quarry blast6 September 2019
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 12:09:072019-09-06
- UTC
- 10:09:072019-09-06
Main parameters
| Date and time | 2019-09-06 10:09:07 UTC 2019-09-06 12:09:07 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.028° N, 5.831° E Uncertainty ± 0.4 km |
| Event ID | ROB 8620 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-09-06 13:01:19 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
- 10
- Epicentral distance
- 21.5 – 121.4km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.5km/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: 9 measurements, root-mean-square deviation 0.15 s. S wave: 5 measurements, root-mean-square deviation 0.14 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)9 stations | |||||
| KLBKalborn | 21.5 | 68 | 10:09:11.26+3.85 s | 10:09:14.17+6.76 s | 2.91 |
| VIAVianden | 28.5 | 111 | 10:09:13.01+5.60 s | 10:09:16.24+8.83 s | 3.23 |
| HOUHouvegnez | 38.4 | 19 | 10:09:14.21+6.80 s | – | – |
| RCHRochefort | 45.5 | 288 | 10:09:15.54+8.13 s | 10:09:20.94+13.53 s | 5.40 |
| MRGMont Rigi | 56.5 | 18 | 10:09:17.35+9.94 s | 10:09:23.94+16.53 s | 6.59 |
| CLAClavier | 57.6 | 319 | 10:09:17.63+10.22 s | – | – |
| MEMSMembach | 65.9 | 11 | 10:09:19.12+11.71 s | – | – |
| MEMHMembach | 65.9 | 11 | 10:09:19.12+11.71 s | 10:09:26.99+19.58 s | 7.87 |
| OPTOpitter | 121.4 | 354 | 10:09:28.75+21.34 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 82.2 | 5 | 10:09:21.76+14.35 s | – | – |