GESVES (BE)
Quarry blast26 October 2021
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 12:19:502021-10-26
- UTC
- 10:19:502021-10-26
Main parameters
| Date and time | 2021-10-26 10:19:50 UTC 2021-10-26 12:19:50 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.449° N, 5.053° E Uncertainty ± 1.3 km |
| Event ID | ROB 14650 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-10-29 16:34:40 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
- 8
- Epicentral distance
- 7.5 – 71.4km
- 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: 8 measurements, root-mean-square deviation 0.49 s. S wave: 7 measurements, root-mean-square deviation 0.58 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)7 stations | |||||
| GESGesves | 7.5 | 161 | 10:19:51.80+1.44 s | 10:19:52.98+2.62 s | 1.18 |
| CLAClavier | 18.0 | 101 | 10:19:53.67+3.31 s | 10:19:57.10+6.74 s | 3.43 |
| MRDMaredsous | 26.1 | 231 | 10:19:54.56+4.20 s | 10:19:58.12+7.76 s | 3.56 |
| RCHRochefort | 34.9 | 159 | 10:19:56.88+6.52 s | 10:20:01.76+11.40 s | 4.88 |
| DOUDourbes | 51.1 | 220 | 10:19:59.72+9.36 s | 10:20:05.66+15.30 s | 5.94 |
| EBNEben-Emael | 58.8 | 49 | 10:20:01.40+11.04 s | 10:20:07.85+17.49 s | 6.45 |
| UCCSUccle | 62.5 | 309 | 10:20:01.38+11.02 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 71.4 | 60 | 10:20:02.11+11.75 s | 10:20:10.49+20.13 s | 8.38 |