YVOIR (BE)
Quarry blast16 February 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 10:29:322021-02-16
- UTC
- 09:29:322021-02-16
Main parameters
| Date and time | 2021-02-16 09:29:32 UTC 2021-02-16 10:29:32 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.295° N, 4.908° E Uncertainty ± 3.2 km |
| Event ID | ROB 12445 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-23 23:29:07 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
- 10.0 – 31.6km
- 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: 5 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)5 stations | |||||
| MRDMaredsous | 10.0 | 274 | 09:29:34.30+2.02 s | 09:29:35.42+3.14 s | 1.12 |
| GESGesves | 16.2 | 52 | 09:29:35.33+3.05 s | 09:29:37.04+4.76 s | 1.71 |
| RCHRochefort | 27.6 | 124 | 09:29:36.83+4.55 s | 09:29:40.70+8.42 s | 3.87 |
| CLAClavier | 31.2 | 64 | 09:29:38.07+5.79 s | 09:29:42.55+10.27 s | 4.48 |
| DOUDourbes | 31.6 | 225 | 09:29:37.90+5.62 s | 09:29:42.29+10.01 s | 4.39 |