MARCHE-EN-FAMENNE (BE)
Quarry blast6 March 2020
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 12:23:362020-03-06
- UTC
- 11:23:362020-03-06
Main parameters
| Date and time | 2020-03-06 11:23:36 UTC 2020-03-06 12:23:36 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.186° N, 5.253° E Uncertainty ± 3.2 km |
| Event ID | ROB 9410 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-06 13:37:41 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
- 4
- Epicentral distance
- 4.0 – 48.1km
- Mean velocity, P wave
- 6.2km/s
- Mean velocity, S wave
- 3.3km/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 0.11 s. S wave: 4 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)4 stations | |||||
| RCHRochefort | 4.0 | 208 | 11:23:38.10+1.21 s | 11:23:38.09+1.20 s | −0.01 |
| GESGesves | 25.1 | 332 | 11:23:41.39+4.50 s | 11:23:44.96+8.07 s | 3.57 |
| CLAClavier | 26.1 | 8 | 11:23:41.44+4.55 s | 11:23:45.35+8.46 s | 3.91 |
| DOUDourbes | 48.1 | 258 | 11:23:45.05+8.16 s | 11:23:51.68+14.79 s | 6.63 |