MARCHE-EN-FAMENNE (BE)
Quarry blast16 March 2021
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:13:432021-03-16
- UTC
- 11:13:432021-03-16
Main parameters
| Date and time | 2021-03-16 11:13:43 UTC 2021-03-16 12:13:43 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.181° N, 5.261° E Uncertainty ± 0.8 km |
| Event ID | ROB 12775 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-18 14:05:03 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
- 3.8 – 61.3km
- Mean velocity, P wave
- 6.0km/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: 5 measurements, root-mean-square deviation 0.20 s. S wave: 5 measurements, root-mean-square deviation 0.22 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 | |||||
| RCHRochefort | 3.8 | 221 | 11:13:44.38+0.64 s | 11:13:45.49+1.75 s | 1.11 |
| GESGesves | 25.9 | 331 | 11:13:48.41+4.67 s | 11:13:51.91+8.17 s | 3.50 |
| CLAClavier | 26.7 | 6 | 11:13:48.49+4.75 s | 11:13:52.33+8.59 s | 3.84 |
| DOUDourbes | 48.6 | 259 | 11:13:52.17+8.43 s | 11:13:58.23+14.49 s | 6.06 |
| KLBKalborn | 61.3 | 98 | 11:13:54.51+10.77 s | 11:14:02.07+18.33 s | 7.56 |