ASSESSE (BE)
Quarry blast9 January 2023
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 11:27:192023-01-09
- UTC
- 10:27:192023-01-09
Main parameters
| Date and time | 2023-01-09 10:27:19 UTC 2023-01-09 11:27:19 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.360° N, 4.963° E Uncertainty ± 3.2 km |
| Event ID | ROB 18305 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-01-10 17:01:39 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
- 9.2 – 39.5km
- Mean velocity, P wave
- 5.3km/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: 4 measurements, root-mean-square deviation 0.01 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 | |||||
| GESGesves | 9.2 | 72 | 10:27:20.74+1.69 s | 10:27:22.17+3.12 s | 1.43 |
| MRDMaredsous | 15.3 | 245 | 10:27:21.87+2.82 s | – | – |
| CLAClavier | 25.0 | 75 | 10:27:23.73+4.68 s | 10:27:27.07+8.02 s | 3.34 |
| DOUDourbes | 39.5 | 222 | 10:27:26.45+7.40 s | 10:27:31.06+12.01 s | 4.61 |
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