HAM-SUR-MEUSE (FR)
Quarry blast26 November 2020
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 11:42:222020-11-26
- UTC
- 10:42:222020-11-26
Main parameters
| Date and time | 2020-11-26 10:42:22 UTC 2020-11-26 11:42:22 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.118° N, 4.777° E Uncertainty ± 1.7 km |
| Event ID | ROB 11400 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-28 17:07:57 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
- 4
- Epicentral distance
- 13.3 – 37.0km
- Mean velocity, P wave
- 6.5km/s
- Mean velocity, S wave
- 3.2km/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 0.69 s. S wave: 4 measurements, root-mean-square deviation 0.32 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)4 stations | |||||
| DOUDourbes | 13.3 | 259 | 10:42:24.72+2.44 s | 10:42:27.06+4.78 s | 2.34 |
| MRDMaredsous | 20.4 | 358 | 10:42:25.53+3.25 s | 10:42:28.67+6.39 s | 3.14 |
| RCHRochefort | 32.4 | 83 | 10:42:26.53+4.25 s | 10:42:32.33+10.05 s | 5.80 |
| GESGesves | 37.0 | 37 | 10:42:29.16+6.88 s | 10:42:34.39+12.11 s | 5.23 |