ROCHEFORT (BE)
Quarry blast25 March 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:56:532020-03-25
- UTC
- 11:56:532020-03-25
Main parameters
| Date and time | 2020-03-25 11:56:53 UTC 2020-03-25 12:56:53 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.179° N, 5.252° E Uncertainty ± 0.3 km |
| Event ID | ROB 9610 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-25 15:32:38 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
- 3.2 – 61.9km
- 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 0.13 s. S wave: 5 measurements, root-mean-square deviation 0.18 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 | 3.2 | 213 | 11:56:54.59+0.64 s | – | – |
| GESGesves | 25.7 | 333 | 11:56:58.68+4.73 s | 11:57:02.19+8.24 s | 3.51 |
| CLAClavier | 26.9 | 8 | 11:56:58.84+4.89 s | 11:57:02.47+8.52 s | 3.63 |
| MRDMaredsous | 37.1 | 292 | 11:57:00.36+6.41 s | 11:57:05.23+11.28 s | 4.87 |
| DOUDourbes | 47.9 | 259 | 11:57:02.43+8.48 s | 11:57:08.48+14.53 s | 6.05 |
| KLBKalborn | 61.9 | 98 | 11:57:04.83+10.88 s | 11:57:12.45+18.50 s | 7.62 |