FRASNES-LEZ-ANVAING (BE)
Quarry blast3 August 2022
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:00:072022-08-03
- UTC
- 11:00:072022-08-03
Main parameters
| Date and time | 2022-08-03 11:00:07 UTC 2022-08-03 13:00:07 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.691° N, 3.540° E Uncertainty ± 4.9 km |
| Event ID | ROB 16735 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-08 11:32:05 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
- 5
- Epicentral distance
- 56.4 – 194.1km
- Mean velocity, P wave
- 5.8km/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: 4 measurements, root-mean-square deviation 0.18 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)5 stations | |||||
| SNFSeneffe | 56.4 | 110 | 11:00:17.47+9.48 s | 11:00:24.88+16.89 s | 7.41 |
| MRDMaredsous | 97.3 | 116 | 11:00:24.91+16.92 s | – | – |
| DOUDourbes | 100.1 | 131 | 11:00:25.09+17.10 s | – | – |
| GESGesves | 114.8 | 107 | 11:00:27.46+19.47 s | 11:00:44.22+36.23 s | 16.76 |
| KLBKalborn | 194.1 | 109 | 11:00:39.31+31.32 s | 11:01:02.14+54.15 s | 22.83 |