FROYENNES (BE)
Controlled explosion14 July 2016
- Magnitude
- 1.5ML
- Depth
- 1.0km ± 8.1
- Belgian time
- 12:30:102016-07-14
- UTC
- 10:30:102016-07-14
Main parameters
| Date and time | 2016-07-14 10:30:10 UTC 2016-07-14 12:30:10 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.617° N, 3.360° E Uncertainty ± 5.5 km |
| Depth of hypocenter | 1.0 ± 8.1 km |
| Event ID | ROB 5543 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2016-07-14 14:08:30 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
- 35.7 – 142.4km
- Mean velocity, P wave
- 6.1km/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. Hypocenter at a depth of 1.0 km. P wave: 7 measurements, root-mean-square deviation 0.24 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)9 stations | ||||||
| LESLessines | 35.7 | 73 | 10:30:16.98+6.51 s | 10:30:20.92+10.45 s | 3.94 | – |
| BOUBougnies | 48.6 | 121 | 10:30:19.37+8.90 s | – | – | – |
| SKQSteenkerque | 51.1 | 86 | 10:30:19.15+8.68 s | – | – | – |
| BRQBracquegnies | 57.0 | 105 | 10:30:20.38+9.91 s | – | – | – |
| RQRRonquières | 61.2 | 91 | 10:30:20.82+10.35 s | – | – | – |
| SNFSeneffe | 66.5 | 100 | 10:30:21.53+11.06 s | – | – | – |
| MRDMaredsous | 105.9 | 109 | 10:30:28.47+18.00 s | – | – | – |
| CLAClavier | 139.5 | 98 | 10:30:33.52+23.05 s | 10:30:51.41+40.94 s | 17.89 | 6.0 |
| RCHRochefort | 142.4 | 110 | 10:30:33.48+23.01 s | – | – | – |