FERNELMONT (BE)
Quarry blast21 October 2022
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:49:262022-10-21
- UTC
- 11:49:262022-10-21
Main parameters
| Date and time | 2022-10-21 11:49:26 UTC 2022-10-21 13:49:26 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.519° N, 4.992° E Uncertainty ± 1.7 km |
| Event ID | ROB 17440 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-10-22 18:59:15 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
- 16.4 – 66.2km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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: 7 measurements, root-mean-square deviation 0.38 s. S wave: 6 measurements, root-mean-square deviation 0.36 s.
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 | |||||
| GESGesves | 16.4 | 156 | 11:49:29.60+2.75 s | 11:49:31.58+4.73 s | 1.98 |
| CLAClavier | 24.6 | 117 | 11:49:31.13+4.28 s | 11:49:34.97+8.12 s | 3.84 |
| MRDMaredsous | 28.9 | 214 | 11:49:32.20+5.35 s | 11:49:35.99+9.14 s | 3.79 |
| RCHRochefort | 43.8 | 157 | 11:49:35.34+8.49 s | 11:49:40.27+13.42 s | 4.93 |
| DOUDourbes | 55.0 | 211 | 11:49:36.94+10.09 s | 11:49:43.42+16.57 s | 6.48 |
| RQRRonquières | 55.2 | 280 | 11:49:36.96+10.11 s | – | – |
| SKQSteenkerque | 66.2 | 283 | 11:49:38.12+11.27 s | 11:49:46.19+19.34 s | 8.07 |