GREVENMACHER (DE)
Quarry blast29 July 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 10:26:002022-07-29
- UTC
- 08:26:002022-07-29
Main parameters
| Date and time | 2022-07-29 08:26:00 UTC 2022-07-29 10:26:00 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 49.718° N, 6.436° E Uncertainty ± 1.5 km |
| Event ID | ROB 16715 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-08 11:30:43 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
- 29.5 – 138.8km
- Mean velocity, P wave
- 5.6km/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 0.15 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)8 stations | |||||
| VIAVianden | 29.5 | 325 | 08:26:05.09+4.69 s | 08:26:09.12+8.72 s | 4.03 |
| KLBKalborn | 48.6 | 331 | 08:26:08.39+7.99 s | 08:26:14.95+14.55 s | 6.56 |
| MRGMont Rigi | 92.0 | 344 | 08:26:16.55+16.15 s | – | – |
| MEMSMembach | 103.7 | 343 | 08:26:18.27+17.87 s | 08:26:30.95+30.55 s | 12.68 |
| MEMHMembach | 103.7 | 343 | 08:26:18.29+17.89 s | – | – |
| CLAClavier | 112.6 | 314 | 08:26:19.80+19.40 s | – | – |
| MRDMaredsous | 136.1 | 299 | 08:26:24.02+23.62 s | – | – |
| DOUDourbes | 138.8 | 288 | 08:26:23.99+23.59 s | – | – |