WELLIN (BE)
Quarry blast19 August 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 12:33:322020-08-19
- UTC
- 10:33:322020-08-19
Main parameters
| Date and time | 2020-08-19 10:33:32 UTC 2020-08-19 12:33:32 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.088° N, 5.153° E Uncertainty ± 1.0 km |
| Event ID | ROB 10705 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-08-19 14:21:45 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
- 9
- Epicentral distance
- 9.2 – 84.2km
- Mean velocity, P wave
- 5.6km/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: 9 measurements, root-mean-square deviation 0.23 s. S wave: 5 measurements, root-mean-square deviation 0.27 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)9 stations | |||||
| RCHRochefort | 9.2 | 35 | 10:33:34.13+1.42 s | 10:33:35.99+3.28 s | 1.86 |
| GESGesves | 33.4 | 352 | 10:33:38.60+5.89 s | 10:33:42.81+10.10 s | 4.21 |
| MRDMaredsous | 36.4 | 311 | 10:33:39.21+6.50 s | 10:33:44.14+11.43 s | 4.93 |
| CLAClavier | 38.3 | 16 | 10:33:39.41+6.70 s | 10:33:44.88+12.17 s | 5.47 |
| DOUDourbes | 39.9 | 271 | 10:33:39.56+6.85 s | 10:33:45.07+12.36 s | 5.51 |
| HOUHouvegnez | 67.6 | 64 | 10:33:44.48+11.77 s | – | – |
| KLBKalborn | 68.4 | 88 | 10:33:44.55+11.84 s | – | – |
| MRGMont Rigi | 80.8 | 54 | 10:33:47.04+14.33 s | – | – |
| MEMHMembach | 84.2 | 46 | 10:33:48.16+15.45 s | – | – |