MARCHE-EN-FAMENNE (BE)
Quarry blast25 April 2019
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:02:232019-04-25
- UTC
- 10:02:232019-04-25
Main parameters
| Date and time | 2019-04-25 10:02:23 UTC 2019-04-25 12:02:23 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.199° N, 5.248° E Uncertainty ± 0.6 km |
| Event ID | ROB 8075 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-04-25 14:37:05 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
- 23.6 – 62.5km
- Mean velocity, P wave
- 6.1km/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 0.09 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)5 stations | |||||
| GESGesves | 23.6 | 331 | 10:02:27.96+4.52 s | 10:02:30.61+7.17 s | 2.65 |
| CLAClavier | 24.8 | 9 | 10:02:28.27+4.83 s | 10:02:31.25+7.81 s | 2.98 |
| MRDMaredsous | 36.1 | 289 | 10:02:29.87+6.43 s | 10:02:34.83+11.39 s | 4.96 |
| DOUDourbes | 48.1 | 256 | 10:02:31.99+8.55 s | 10:02:37.93+14.49 s | 5.94 |
| KLBKalborn | 62.5 | 100 | 10:02:34.25+10.81 s | – | – |