WELLIN (BE)
Quarry blast17 February 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:36:032020-02-17
- UTC
- 12:36:032020-02-17
Main parameters
| Date and time | 2020-02-17 12:36:03 UTC 2020-02-17 13:36:03 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.096° N, 5.100° E Uncertainty ± 0.6 km |
| Event ID | ROB 9295 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-02-17 14:15:44 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
- 11
- Epicentral distance
- 11.2 – 119.3km
- Mean velocity, P wave
- 6.6km/s
- Mean velocity, S wave
- 3.5km/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: 11 measurements, root-mean-square deviation 0.69 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)11 stations | |||||
| RCHRochefort | 11.2 | 54 | 12:36:04.80+1.80 s | 12:36:06.93+3.93 s | 2.13 |
| GESGesves | 32.2 | 358 | 12:36:09.02+6.02 s | 12:36:13.52+10.52 s | 4.50 |
| MRDMaredsous | 33.0 | 314 | 12:36:08.74+5.74 s | 12:36:13.54+10.54 s | 4.80 |
| DOUDourbes | 36.1 | 270 | 12:36:09.43+6.43 s | 12:36:14.05+11.05 s | 4.62 |
| CLAClavier | 38.8 | 22 | 12:36:09.82+6.82 s | 12:36:14.68+11.68 s | 4.86 |
| HOUHouvegnez | 70.7 | 66 | 12:36:15.29+12.29 s | – | – |
| KLBKalborn | 72.2 | 89 | 12:36:15.64+12.64 s | – | – |
| BOUBougnies | 88.6 | 292 | 12:36:18.30+15.30 s | – | – |
| UCCSUccle | 94.1 | 326 | 12:36:19.17+16.17 s | – | – |
| OPTBOpitter | 119.3 | 18 | 12:36:21.11+18.11 s | – | – |
| OPTOpitter | 119.3 | 18 | 12:36:21.11+18.11 s | – | – |