WELLIN (BE)
Quarry blast26 April 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:57:082021-04-26
- UTC
- 10:57:082021-04-26
Main parameters
| Date and time | 2021-04-26 10:57:08 UTC 2021-04-26 12:57:08 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.093° N, 5.091° E Uncertainty ± 1.0 km |
| Event ID | ROB 13255 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-30 15:30:39 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
- 5
- Epicentral distance
- 11.9 – 72.9km
- Mean velocity, P wave
- 5.8km/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: 5 measurements, root-mean-square deviation 0.18 s. S wave: 5 measurements, root-mean-square deviation 0.20 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 | |||||
| RCHRochefort | 11.9 | 55 | 10:57:10.32+1.77 s | 10:57:12.11+3.56 s | 1.79 |
| GESGesves | 32.5 | 360 | 10:57:14.40+5.85 s | 10:57:19.04+10.49 s | 4.64 |
| DOUDourbes | 35.5 | 271 | 10:57:14.79+6.24 s | 10:57:19.59+11.04 s | 4.80 |
| CLAClavier | 39.3 | 22 | 10:57:15.44+6.89 s | 10:57:20.71+12.16 s | 5.27 |
| KLBKalborn | 72.9 | 89 | 10:57:21.07+12.52 s | 10:57:31.01+22.46 s | 9.94 |