FRASNES-LEZ-ANVAING (BE)
Quarry blast21 November 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:00:062022-11-21
- UTC
- 12:00:062022-11-21
Main parameters
| Date and time | 2022-11-21 12:00:06 UTC 2022-11-21 13:00:06 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.695° N, 3.634° E Uncertainty ± 9.3 km |
| Event ID | ROB 17785 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-11-21 14:47:41 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
- 32.0 – 188.0km
- 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: 5 measurements, root-mean-square deviation 0.72 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 | |||||
| SKQSteenkerque | 32.0 | 99 | 12:00:11.38+5.05 s | 12:00:16.07+9.74 s | 4.69 |
| BDHNBois d'Haine | 45.9 | 116 | 12:00:14.96+8.63 s | – | – |
| SNFSeneffe | 50.4 | 114 | 12:00:13.88+7.55 s | – | – |
| DOUDourbes | 95.6 | 134 | 12:00:23.22+16.89 s | 12:00:34.17+27.84 s | 10.95 |
| GESGesves | 108.7 | 108 | 12:00:24.17+17.84 s | 12:00:39.82+33.49 s | 15.65 |
| CLAClavier | 122.2 | 104 | 12:00:27.41+21.08 s | – | – |
| KLBKalborn | 188.0 | 110 | 12:00:35.75+29.42 s | 12:00:59.57+53.24 s | 23.82 |