NAMUR (BE)
Quarry blast2 February 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 13:37:542022-02-02
- UTC
- 12:37:542022-02-02
Main parameters
| Date and time | 2022-02-02 12:37:54 UTC 2022-02-02 13:37:54 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.492° N, 4.968° E Uncertainty ± 1.4 km |
| Event ID | ROB 15360 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-07 09:25:12 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
- 11
- Epicentral distance
- 14.6 – 107.7km
- Mean velocity, P wave
- 5.7km/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: 11 measurements, root-mean-square deviation 0.33 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)10 stations | |||||
| GESGesves | 14.6 | 144 | 12:37:57.03+2.36 s | 12:37:58.98+4.31 s | 1.95 |
| CLAClavier | 25.1 | 109 | 12:37:58.94+4.27 s | 12:38:02.24+7.57 s | 3.30 |
| MRDMaredsous | 25.4 | 214 | 12:37:59.46+4.79 s | 12:38:02.72+8.05 s | 3.26 |
| TGATangissart | 34.0 | 292 | 12:38:00.64+5.97 s | – | – |
| STISart Tilman | 43.5 | 76 | 12:38:02.87+8.20 s | – | – |
| DOUDourbes | 51.5 | 211 | 12:38:04.11+9.44 s | – | – |
| RQRRonquières | 54.1 | 284 | 12:38:03.80+9.13 s | – | – |
| MRGMont Rigi | 78.6 | 88 | 12:38:08.42+13.75 s | – | – |
| KLBKalborn | 92.3 | 118 | 12:38:11.04+16.37 s | – | – |
| VIAVianden | 107.7 | 125 | 12:38:13.89+19.22 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 74.7 | 66 | 12:38:07.25+12.58 s | – | – |
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