HAM-SUR-MEUSE (FR)
Quarry blast25 July 2022
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 11:43:492022-07-25
- UTC
- 09:43:492022-07-25
Main parameters
| Date and time | 2022-07-25 09:43:49 UTC 2022-07-25 11:43:49 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.111° N, 4.785° E Uncertainty ± 1.8 km |
| Event ID | ROB 16665 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-25 21:37:43 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
- 5
- Epicentral distance
- 13.7 – 50.3km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.1km/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 0.48 s. S wave: 5 measurements, root-mean-square deviation 0.33 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)5 stations | |||||
| DOUDourbes | 13.7 | 263 | 09:43:51.83+2.65 s | 09:43:54.02+4.84 s | 2.19 |
| MRDMaredsous | 21.3 | 357 | 09:43:51.86+2.68 s | 09:43:55.48+6.30 s | 3.62 |
| RCHRochefort | 32.0 | 81 | 09:43:54.33+5.15 s | 09:43:59.24+10.06 s | 4.91 |
| GESGesves | 37.3 | 35 | 09:43:55.77+6.59 s | 09:44:01.15+11.97 s | 5.38 |
| CLAClavier | 50.3 | 47 | 09:43:58.09+8.91 s | 09:44:05.03+15.85 s | 6.94 |