WELLIN (BE)
Quarry blast10 August 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:15:182021-08-10
- UTC
- 10:15:182021-08-10
Main parameters
| Date and time | 2021-08-10 10:15:18 UTC 2021-08-10 12:15:18 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.096° N, 5.133° E Uncertainty ± 2.2 km |
| Event ID | ROB 14215 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-08-11 09:18:05 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
- 9.4 – 84.6km
- Mean velocity, P wave
- 5.8km/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: 10 measurements, root-mean-square deviation 0.34 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)10 stations | |||||
| RCHRochefort | 9.4 | 46 | 10:15:20.23+1.50 s | – | – |
| GESGesves | 32.3 | 354 | 10:15:24.78+6.05 s | – | – |
| MRDMaredsous | 34.7 | 312 | 10:15:25.33+6.60 s | 10:15:28.97+10.24 s | 3.64 |
| DOUDourbes | 38.5 | 270 | 10:15:25.66+6.93 s | 10:15:30.41+11.68 s | 4.75 |
| HOUHouvegnez | 68.6 | 65 | 10:15:30.48+11.75 s | – | – |
| KLBKalborn | 69.9 | 89 | 10:15:30.61+11.88 s | – | – |
| TGATangissart | 71.4 | 323 | 10:15:31.13+12.40 s | – | – |
| SNFSeneffe | 76.1 | 308 | 10:15:31.85+13.12 s | – | – |
| MRGMont Rigi | 81.5 | 55 | 10:15:32.80+14.07 s | – | – |
| MEMHMembach | 84.6 | 47 | 10:15:34.22+15.49 s | – | – |
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