PHILIPPEVILLE (BE)
Quarry blast30 November 2021
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 15:24:362021-11-30
- UTC
- 14:24:362021-11-30
Main parameters
| Date and time | 2021-11-30 14:24:36 UTC 2021-11-30 15:24:36 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.188° N, 4.619° E Uncertainty ± 2.3 km |
| Event ID | ROB 14890 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-12-06 13:50:07 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
- 7
- Epicentral distance
- 10.5 – 116.8km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.1km/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: 7 measurements, root-mean-square deviation 0.47 s. S wave: 4 measurements, root-mean-square deviation 0.51 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 | 10.5 | 189 | 14:24:37.66+1.21 s | 14:24:40.37+3.92 s | 2.71 |
| MRDMaredsous | 16.5 | 40 | 14:24:38.18+1.73 s | 14:24:41.40+4.95 s | 3.22 |
| GESGesves | 39.9 | 57 | 14:24:43.36+6.91 s | 14:24:48.50+12.05 s | 5.14 |
| RCHRochefort | 43.6 | 95 | 14:24:43.95+7.50 s | 14:24:50.44+13.99 s | 6.49 |
| SKQSteenkerque | 64.0 | 323 | 14:24:47.82+11.37 s | – | – |
| VIAVianden | 116.8 | 103 | 14:24:56.99+20.54 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 113.1 | 55 | 14:24:55.39+18.94 s | – | – |