WELLIN (BE)
Quarry blast14 April 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:52:392021-04-14
- UTC
- 11:52:392021-04-14
Main parameters
| Date and time | 2021-04-14 11:52:39 UTC 2021-04-14 13:52:39 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.093° N, 5.141° E Uncertainty ± 0.8 km |
| Event ID | ROB 13125 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-14 23:25:05 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
- 6
- Epicentral distance
- 9.2 – 69.3km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.3km/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 0.19 s. S wave: 5 measurements, root-mean-square deviation 0.30 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)6 stations | |||||
| RCHRochefort | 9.2 | 42 | 11:52:41.27+1.37 s | – | – |
| GESGesves | 32.7 | 353 | 11:52:45.66+5.76 s | 11:52:50.22+10.32 s | 4.56 |
| MRDMaredsous | 35.3 | 311 | 11:52:46.25+6.35 s | 11:52:51.11+11.21 s | 4.86 |
| CLAClavier | 38.0 | 17 | 11:52:46.55+6.65 s | 11:52:51.72+11.82 s | 5.17 |
| DOUDourbes | 39.1 | 271 | 11:52:46.63+6.73 s | 11:52:51.93+12.03 s | 5.30 |
| KLBKalborn | 69.3 | 89 | 11:52:52.31+12.41 s | 11:53:00.61+20.71 s | 8.30 |