YVOIR (BE)
Quarry blast13 January 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 09:29:162021-01-13
- UTC
- 08:29:162021-01-13
Main parameters
| Date and time | 2021-01-13 08:29:16 UTC 2021-01-13 09:29:16 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.298° N, 4.906° E Uncertainty ± 1.3 km |
| Event ID | ROB 11860 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-01-13 22:53:33 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
- 9.8 – 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 0.21 s. S wave: 5 measurements, root-mean-square deviation 0.32 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 | 9.8 | 273 | 08:29:18.11+2.04 s | 08:29:19.30+3.23 s | 1.19 |
| GESGesves | 16.2 | 53 | 08:29:19.38+3.31 s | 08:29:21.09+5.02 s | 1.71 |
| RCHRochefort | 27.9 | 125 | 08:29:21.11+5.04 s | 08:29:24.59+8.52 s | 3.48 |
| CLAClavier | 31.3 | 64 | 08:29:22.06+5.99 s | 08:29:26.61+10.54 s | 4.55 |
| DOUDourbes | 31.6 | 225 | 08:29:21.61+5.54 s | 08:29:26.21+10.14 s | 4.60 |