WELLIN (BE)
Quarry blast26 October 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:42:342020-10-26
- UTC
- 12:42:342020-10-26
Main parameters
| Date and time | 2020-10-26 12:42:34 UTC 2020-10-26 13:42:34 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.056° N, 5.139° E Uncertainty ± 3.6 km |
| Event ID | ROB 11165 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-27 14:54:27 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
- 4
- Epicentral distance
- 12.7 – 42.0km
- Mean velocity, P wave
- 8.0km/s
- Mean velocity, S wave
- 4.7km/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: 4 measurements, root-mean-square deviation 0.64 s. S wave: 4 measurements, root-mean-square deviation 2.39 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)4 stations | |||||
| RCHRochefort | 12.7 | 30 | 12:42:37.04+2.44 s | 12:42:38.83+4.23 s | 1.79 |
| GESGesves | 36.8 | 354 | 12:42:41.21+6.61 s | 12:42:46.18+11.58 s | 4.97 |
| DOUDourbes | 39.2 | 277 | 12:42:41.68+7.08 s | 12:42:46.52+11.92 s | 4.84 |
| CLAClavier | 42.0 | 16 | 12:42:40.65+6.05 s | 12:42:41.36+6.76 s | 0.71 |