WAIMES (BE)
Quarry blast17 February 2021
- Magnitude
- 0.6ML
- Depth
- –
- Belgian time
- 15:05:352021-02-17
- UTC
- 14:05:352021-02-17
Main parameters
| Date and time | 2021-02-17 14:05:35 UTC 2021-02-17 15:05:35 Belgian time |
|---|---|
| Magnitude | ML 0.6 |
| Epicentral coordinates | 50.400° N, 6.105° E Uncertainty ± 0.9 km |
| Event ID | ROB 12490 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-25 22:52:21 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
- 6
- Epicentral distance
- 8.8 – 42.3km
- Mean velocity, P wave
- 5.5km/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: 6 measurements, root-mean-square deviation 0.06 s. S wave: 6 measurements, root-mean-square deviation 0.22 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 | |||||
| HOUHouvegnez | 8.8 | 235 | 14:05:36.99+1.72 s | 14:05:38.30+3.03 s | 1.31 |
| MRGMont Rigi | 12.6 | 350 | 14:05:37.65+2.38 s | 14:05:39.24+3.97 s | 1.59 |
| TNLTernell | 20.8 | 5 | 14:05:39.05+3.78 s | 14:05:41.98+6.71 s | 2.93 |
| MEMHMembach | 24.2 | 344 | 14:05:39.88+4.61 s | 14:05:43.39+8.12 s | 3.51 |
| KLBKalborn | 33.3 | 180 | 14:05:41.40+6.13 s | 14:05:45.64+10.37 s | 4.24 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 42.3 | 343 | 14:05:43.09+7.82 s | 14:05:49.06+13.79 s | 5.97 |