FRANC-WARET (BE)
Quarry blast20 October 2016
- Magnitude
- 1.4ML
- Depth
- 7.3km ± 8.0
- Belgian time
- 14:18:552016-10-20
- UTC
- 12:18:552016-10-20
Main parameters
| Date and time | 2016-10-20 12:18:55 UTC 2016-10-20 14:18:55 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.526° N, 4.965° E Uncertainty ± 1.5 km |
| Depth of hypocenter | 7.3 ± 8.0 km |
| Event ID | ROB 5566 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2016-10-20 14:58:18 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
- 13
- Epicentral distance
- 26.7 – 128.0km
- Mean velocity, P wave
- 5.7km/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. Hypocenter at a depth of 7.3 km. P wave: 12 measurements, root-mean-square deviation 0.42 s. S wave: 8 measurements, root-mean-square deviation 0.26 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)13 stations | ||||||
| CLAClavier | 26.7 | 116 | 12:19:00.33+4.43 s | 12:19:03.98+8.08 s | 3.65 | 26.1 |
| MRDMaredsous | 28.5 | 209 | 12:19:00.85+4.95 s | 12:19:04.57+8.67 s | 3.72 | – |
| RCHRochefort | 45.3 | 156 | 12:19:03.23+7.33 s | 12:19:09.13+13.23 s | 5.90 | – |
| LCHLa Chartreuse | 46.7 | 74 | 12:19:02.86+6.96 s | 12:19:09.50+13.60 s | 6.64 | – |
| SNFSeneffe | 48.3 | 268 | 12:19:04.71+8.81 s | – | – | – |
| RQRRonquières | 53.1 | 280 | 12:19:04.26+8.36 s | – | – | – |
| DOUDourbes | 54.7 | 209 | 12:19:05.52+9.62 s | 12:19:12.51+16.61 s | 6.99 | – |
| SKQSteenkerque | 64.1 | 283 | 12:19:06.79+10.89 s | – | – | – |
| MEMSMembach | 74.6 | 82 | 12:19:08.84+12.94 s | 12:19:18.67+22.77 s | 9.83 | – |
| HOUHouvegnez | 76.3 | 104 | 12:19:08.65+12.75 s | 12:19:18.51+22.61 s | 9.86 | – |
| MRGMont Rigi | 78.8 | 91 | 12:19:09.60+13.70 s | 12:19:19.41+23.51 s | 9.81 | – |
| KLBKalborn | 94.3 | 120 | 12:19:11.96+16.06 s | – | – | – |
| WLFWalferdange | 128.0 | 138 | 12:19:15.18+19.28 s | – | – | – |