YVOIR (BE)
Quarry blast26 February 2021
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 10:29:442021-02-26
- UTC
- 09:29:442021-02-26
Main parameters
| Date and time | 2021-02-26 09:29:44 UTC 2021-02-26 10:29:44 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.296° N, 4.898° E Uncertainty ± 1.4 km |
| Event ID | ROB 12515 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-26 11:18:10 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
- 9.3 – 31.8km
- Mean velocity, P wave
- 5.9km/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 0.28 s. S wave: 5 measurements, root-mean-square deviation 0.15 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 | 9.3 | 274 | 09:29:46.21+2.00 s | 09:29:47.30+3.09 s | 1.09 |
| GESGesves | 16.7 | 54 | 09:29:47.53+3.32 s | 09:29:49.37+5.16 s | 1.84 |
| RCHRochefort | 28.2 | 124 | 09:29:48.85+4.64 s | 09:29:53.21+9.00 s | 4.36 |
| DOUDourbes | 31.1 | 224 | 09:29:49.60+5.39 s | 09:29:54.18+9.97 s | 4.58 |
| CLAClavier | 31.8 | 64 | 09:29:50.24+6.03 s | 09:29:54.54+10.33 s | 4.30 |