PHILIPPEVILLE (BE)
Quarry blast13 July 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:25:242020-07-13
- UTC
- 11:25:242020-07-13
Main parameters
| Date and time | 2020-07-13 11:25:24 UTC 2020-07-13 13:25:24 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.212° N, 4.499° E Uncertainty ± 5.5 km |
| Event ID | ROB 10455 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-13 23:16:33 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
- 14.7 – 61.6km
- Mean velocity, P wave
- 6.6km/s
- Mean velocity, S wave
- 3.5km/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 0.56 s. S wave: 5 measurements, root-mean-square deviation 0.23 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 | |||||
| DOUDourbes | 14.7 | 152 | 11:25:27.35+2.55 s | 11:25:29.98+5.18 s | 2.63 |
| MRDMaredsous | 21.6 | 62 | 11:25:29.52+4.72 s | 11:25:31.59+6.79 s | 2.07 |
| GESGesves | 46.1 | 65 | 11:25:33.15+8.35 s | 11:25:38.59+13.79 s | 5.44 |
| RCHRochefort | 52.4 | 97 | 11:25:33.90+9.10 s | 11:25:40.42+15.62 s | 6.52 |
| CLAClavier | 61.6 | 68 | 11:25:34.21+9.41 s | 11:25:43.56+18.76 s | 9.35 |