WASSENACH (DE)
Quarry blast4 February 2022
- Magnitude
- 1.4ML
- Depth
- 5.5km ± 5.5
- Belgian time
- 12:28:372022-02-04
- UTC
- 11:28:372022-02-04
Main parameters
| Date and time | 2022-02-04 11:28:37 UTC 2022-02-04 12:28:37 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.435° N, 7.313° E Uncertainty ± 1.8 km |
| Depth of hypocenter | 5.5 ± 5.5 km |
| Event ID | ROB 15380 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-07 09:26:29 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
- 8
- Epicentral distance
- 85.6 – 142.9km
- 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. Hypocenter at a depth of 5.5 km. P wave: 7 measurements, root-mean-square deviation 0.40 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)7 stations | |||||
| TNLTernell | 85.6 | 282 | 11:28:52.61+14.75 s | – | – |
| MRGMont Rigi | 88.3 | 276 | 11:28:53.19+15.33 s | – | – |
| HOUHouvegnez | 93.4 | 265 | 11:28:54.15+16.29 s | – | – |
| KLBKalborn | 93.6 | 247 | 11:28:53.00+15.14 s | – | – |
| MEMSMembach | 94.4 | 282 | 11:28:54.45+16.59 s | – | – |
| VIAVianden | 96.9 | 235 | 11:28:54.45+16.59 s | – | – |
| CLAClavier | 142.9 | 270 | 11:29:02.34+24.48 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 104.4 | 291 | 11:28:55.96+18.10 s | 11:29:07.47+29.61 s | 11.51 |