WELKENRAEDT (BE)
Quarry blast25 February 2022
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 14:41:142022-02-25
- UTC
- 13:41:142022-02-25
Main parameters
| Date and time | 2022-02-25 13:41:14 UTC 2022-02-25 14:41:14 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.653° N, 5.995° E Uncertainty ± 1.1 km |
| Event ID | ROB 15525 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-28 09:58:31 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
- 7
- Epicentral distance
- 5.0 – 33.2km
- Mean velocity, P wave
- 6.2km/s
- Mean velocity, S wave
- 3.1km/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: 7 measurements, root-mean-square deviation 0.19 s. S wave: 6 measurements, root-mean-square deviation 0.16 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 | |||||
| MEMSMembach | 5.0 | 168 | 13:41:14.99+0.84 s | 13:41:16.29+2.14 s | 1.30 |
| MEMHMembach | 5.0 | 168 | 13:41:15.01+0.86 s | 13:41:16.31+2.16 s | 1.30 |
| TNLTernell | 12.1 | 128 | 13:41:16.59+2.44 s | 13:41:18.42+4.27 s | 1.83 |
| MRGMont Rigi | 16.7 | 160 | 13:41:17.01+2.86 s | 13:41:19.66+5.51 s | 2.65 |
| HOUHouvegnez | 33.2 | 179 | 13:41:19.91+5.76 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 13.2 | 340 | 13:41:16.81+2.66 s | 13:41:18.84+4.69 s | 2.03 |
| TERZTerziet | 13.2 | 331 | 13:41:16.67+2.52 s | 13:41:18.67+4.52 s | 2.00 |