NAMUR (BE)
Quarry blast3 March 2023
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 13:44:492023-03-03
- UTC
- 12:44:492023-03-03
Main parameters
| Date and time | 2023-03-03 12:44:49 UTC 2023-03-03 13:44:49 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.487° N, 4.937° E Uncertainty ± 1.4 km |
| Event ID | ROB 18975 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-03-04 11:17:58 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
- 15.6 – 32.2km
- Mean velocity, P wave
- 5.9km/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 0.19 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 | 15.6 | 137 | 12:44:52.05+3.02 s | 12:44:54.05+5.02 s | 2.00 |
| MRDMaredsous | 23.9 | 210 | 12:44:53.08+4.05 s | 12:44:56.90+7.87 s | 3.82 |
| CLAClavier | 27.0 | 106 | 12:44:54.14+5.11 s | 12:44:57.65+8.62 s | 3.51 |
| TGATangissart | 32.2 | 294 | 12:44:54.77+5.74 s | – | – |
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