PHILIPPEVILLE (BE)
Quarry blast25 February 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:35:202021-02-25
- UTC
- 12:35:202021-02-25
Main parameters
| Date and time | 2021-02-25 12:35:20 UTC 2021-02-25 13:35:20 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.204° N, 4.545° E Uncertainty ± 1.4 km |
| Event ID | ROB 12550 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-26 21:23:17 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
- 9
- Epicentral distance
- 12.6 – 113.5km
- 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: 9 measurements, root-mean-square deviation 0.67 s. S wave: 6 measurements, root-mean-square deviation 0.56 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)9 stations | |||||
| DOUDourbes | 12.6 | 164 | 12:35:22.93+2.08 s | 12:35:25.58+4.73 s | 2.65 |
| MRDMaredsous | 19.3 | 55 | 12:35:23.45+2.60 s | 12:35:26.39+5.54 s | 2.94 |
| SNFSeneffe | 38.9 | 332 | 12:35:27.99+7.14 s | – | – |
| GESGesves | 43.6 | 62 | 12:35:29.06+8.21 s | 12:35:34.72+13.87 s | 5.66 |
| BOUBougnies | 47.5 | 296 | 12:35:28.97+8.12 s | – | – |
| RCHRochefort | 49.0 | 96 | 12:35:27.86+7.01 s | 12:35:35.50+14.65 s | 7.64 |
| CLAClavier | 59.0 | 66 | 12:35:30.77+9.92 s | 12:35:38.64+17.79 s | 7.87 |
| KLBKalborn | 112.3 | 95 | 12:35:40.01+19.16 s | – | – |
| MEMHMembach | 113.5 | 66 | 12:35:41.01+20.16 s | 12:35:54.04+33.19 s | 13.03 |