SOUMAGNE (BE)
Quarry blast11 May 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 11:32:072021-05-11
- UTC
- 09:32:072021-05-11
Main parameters
| Date and time | 2021-05-11 09:32:07 UTC 2021-05-11 11:32:07 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.611° N, 5.714° E Uncertainty ± 0.8 km |
| Event ID | ROB 13410 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-11 17:07:18 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
- 6
- Epicentral distance
- 8.7 – 35.2km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.2km/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: 6 measurements, root-mean-square deviation 0.20 s. S wave: 6 measurements, root-mean-square deviation 0.21 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)5 stations | |||||
| LCHLa Chartreuse | 8.7 | 291 | 09:32:09.61+1.65 s | 09:32:11.13+3.17 s | 1.52 |
| MEMSMembach | 20.9 | 90 | 09:32:11.57+3.61 s | 09:32:14.60+6.64 s | 3.03 |
| MEMHMembach | 20.9 | 90 | 09:32:11.59+3.63 s | 09:32:14.58+6.62 s | 2.99 |
| MRGMont Rigi | 27.9 | 113 | 09:32:13.28+5.32 s | 09:32:16.80+8.84 s | 3.52 |
| HOUHouvegnez | 35.2 | 144 | 09:32:14.00+6.04 s | 09:32:19.21+11.25 s | 5.21 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 23.0 | 42 | 09:32:12.16+4.20 s | 09:32:15.80+7.84 s | 3.64 |