YVOIR (BE)
Quarry blast19 November 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 14:14:432021-11-19
- UTC
- 13:14:432021-11-19
Main parameters
| Date and time | 2021-11-19 13:14:43 UTC 2021-11-19 14:14:43 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.337° N, 4.990° E Uncertainty ± 0.8 km |
| Event ID | ROB 14820 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-19 16:01:54 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
- 8.7 – 39.0km
- Mean velocity, P wave
- 6.0km/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: 5 measurements, root-mean-square deviation 0.18 s. S wave: 5 measurements, root-mean-square deviation 0.18 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 | |||||
| GESGesves | 8.7 | 52 | 13:14:45.00+1.47 s | 13:14:46.82+3.29 s | 1.82 |
| MRDMaredsous | 16.3 | 256 | 13:14:46.55+3.02 s | 13:14:49.00+5.47 s | 2.45 |
| CLAClavier | 24.0 | 68 | 13:14:47.86+4.33 s | 13:14:51.31+7.78 s | 3.45 |
| RCHRochefort | 26.4 | 140 | 13:14:48.25+4.72 s | 13:14:51.87+8.34 s | 3.62 |
| DOUDourbes | 39.0 | 226 | 13:14:50.57+7.04 s | 13:14:55.52+11.99 s | 4.95 |