Foisches (FR)
Quarry blast1 March 2019
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 11:15:542019-03-01
- UTC
- 10:15:542019-03-01
Main parameters
| Date and time | 2019-03-01 10:15:54 UTC 2019-03-01 11:15:54 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.121° N, 4.778° E Uncertainty ± 1.6 km |
| Event ID | ROB 7925 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-03-01 13:41:49 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
- 13.4 – 60.8km
- Mean velocity, P wave
- 5.6km/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: 6 measurements, root-mean-square deviation 0.24 s. S wave: 5 measurements, root-mean-square deviation 0.46 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 | |||||
| DOUDourbes | 13.4 | 257 | 10:15:56.63+2.31 s | 10:15:58.88+4.56 s | 2.25 |
| MRDMaredsous | 20.1 | 358 | 10:15:57.49+3.17 s | 10:16:00.41+6.09 s | 2.92 |
| RCHRochefort | 32.3 | 83 | 10:15:59.98+5.66 s | 10:16:04.58+10.26 s | 4.60 |
| GESGesves | 36.7 | 37 | 10:16:00.82+6.50 s | 10:16:04.67+10.35 s | 3.85 |
| CLAClavier | 49.9 | 48 | 10:16:03.66+9.34 s | 10:16:09.51+15.19 s | 5.85 |
| BRQBracquegnies | 60.8 | 311 | 10:16:05.17+10.85 s | – | – |