YVOIR (BE)
Quarry blast25 January 2023
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 10:29:192023-01-25
- UTC
- 09:29:192023-01-25
Main parameters
| Date and time | 2023-01-25 09:29:19 UTC 2023-01-25 10:29:19 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.292° N, 4.897° E Uncertainty ± 1.0 km |
| Event ID | ROB 18495 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-01-30 12:15:18 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
- 4
- Epicentral distance
- 9.3 – 32.1km
- Mean velocity, P wave
- 5.8km/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: 4 measurements, root-mean-square deviation 0.09 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)4 stations | |||||
| MRDMaredsous | 9.3 | 277 | 09:29:20.91+1.72 s | 09:29:22.53+3.34 s | 1.62 |
| GESGesves | 17.0 | 52 | 09:29:22.33+3.14 s | 09:29:24.94+5.75 s | 2.61 |
| DOUDourbes | 30.8 | 225 | 09:29:24.53+5.34 s | 09:29:28.92+9.73 s | 4.39 |
| CLAClavier | 32.1 | 64 | 09:29:25.00+5.81 s | – | – |
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