SOUMAGNE (BE)
Quarry blast16 September 2021
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:56:372021-09-16
- UTC
- 11:56:372021-09-16
Main parameters
| Date and time | 2021-09-16 11:56:37 UTC 2021-09-16 13:56:37 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.610° N, 5.712° E Uncertainty ± 1.3 km |
| Event ID | ROB 14430 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-09-16 15:46:08 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
- 7
- Epicentral distance
- 8.6 – 50.9km
- Mean velocity, P wave
- 6.1km/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: 7 measurements, root-mean-square deviation 0.24 s. S wave: 6 measurements, root-mean-square deviation 0.48 s.
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 | |||||
| LCHLa Chartreuse | 8.6 | 292 | 11:56:39.00+1.44 s | 11:56:41.15+3.59 s | 2.15 |
| MEMSMembach | 21.1 | 90 | 11:56:41.25+3.69 s | 11:56:44.81+7.25 s | 3.56 |
| CLAClavier | 36.0 | 234 | 11:56:43.79+6.23 s | – | – |
| GESGesves | 50.9 | 241 | 11:56:46.50+8.94 s | 11:56:52.81+15.25 s | 6.31 |
| Dutch seismic network (KNMI)3 stations | |||||
| TERZTerziet | 21.3 | 40 | 11:56:41.53+3.97 s | 11:56:44.34+6.78 s | 2.81 |
| HGNHeimansgroeve | 23.1 | 42 | 11:56:41.81+4.25 s | 11:56:43.98+6.42 s | 2.17 |
| VKBValkenburg | 29.0 | 10 | 11:56:43.08+5.52 s | 11:56:46.29+8.73 s | 3.21 |