MARCHE-EN-FAMENNE (BE)
Quarry blast27 March 2020
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:05:292020-03-27
- UTC
- 11:05:292020-03-27
Main parameters
| Date and time | 2020-03-27 11:05:29 UTC 2020-03-27 12:05:29 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.179° N, 5.274° E Uncertainty ± 0.8 km |
| Event ID | ROB 9650 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-27 16:12:03 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
- 6
- Epicentral distance
- 4.3 – 60.4km
- Mean velocity, P wave
- 5.9km/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: 6 measurements, root-mean-square deviation 0.23 s. S wave: 6 measurements, root-mean-square deviation 0.25 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)6 stations | |||||
| RCHRochefort | 4.3 | 232 | 11:05:29.92+0.82 s | 11:05:30.70+1.60 s | 0.78 |
| GESGesves | 26.5 | 330 | 11:05:33.68+4.58 s | 11:05:37.63+8.53 s | 3.95 |
| CLAClavier | 26.8 | 4 | 11:05:34.07+4.97 s | 11:05:37.63+8.53 s | 3.56 |
| MRDMaredsous | 38.6 | 291 | 11:05:35.89+6.79 s | 11:05:40.77+11.67 s | 4.88 |
| DOUDourbes | 49.4 | 259 | 11:05:37.66+8.56 s | 11:05:43.81+14.71 s | 6.15 |
| KLBKalborn | 60.4 | 98 | 11:05:40.04+10.94 s | 11:05:46.82+17.72 s | 6.78 |