GIESDORF (DE)
Quarry blast8 April 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:17:362022-04-08
- UTC
- 11:17:362022-04-08
Main parameters
| Date and time | 2022-04-08 11:17:36 UTC 2022-04-08 13:17:36 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.178° N, 6.460° E Uncertainty ± 0.6 km |
| Event ID | ROB 15930 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-04-13 08:22:44 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
- 26.6 – 133.7km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.2km/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 0.19 s. S wave: 4 measurements, root-mean-square deviation 0.31 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 | |||||
| KLBKalborn | 26.6 | 251 | 11:17:41.21+4.58 s | 11:17:44.98+8.35 s | 3.77 |
| VIAVianden | 32.8 | 214 | 11:17:42.40+5.77 s | 11:17:46.89+10.26 s | 4.49 |
| HOUHouvegnez | 37.9 | 301 | 11:17:43.38+6.75 s | 11:17:47.78+11.15 s | 4.40 |
| MRGMont Rigi | 46.1 | 324 | 11:17:45.09+8.46 s | 11:17:50.53+13.90 s | 5.44 |
| TNLTernell | 51.1 | 333 | 11:17:45.71+9.08 s | – | – |
| MEMSMembach | 57.7 | 326 | 11:17:47.47+10.84 s | – | – |
| DOUDourbes | 133.7 | 267 | 11:17:59.73+23.10 s | – | – |