BASTOGNE (BE)
Quarry blast12 May 2017
- Magnitude
- 1.1ML
- Depth
- 4.1km ± 4.6
- Belgian time
- 10:39:392017-05-12
- UTC
- 08:39:392017-05-12
Main parameters
| Date and time | 2017-05-12 08:39:39 UTC 2017-05-12 10:39:39 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.023° N, 5.741° E Uncertainty ± 1.1 km |
| Depth of hypocenter | 4.1 ± 4.6 km |
| Event ID | ROB 5698 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-05-12 11:02:30 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
- 13
- Epicentral distance
- 27.7 – 137.2km
- Mean velocity, P wave
- 5.8km/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. Hypocenter at a depth of 4.1 km. P wave: 12 measurements, root-mean-square deviation 0.49 s. S wave: 9 measurements, root-mean-square deviation 0.53 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 | ||||||
| KLBKalborn | 27.7 | 72 | 08:39:44.08+4.67 s | 08:39:47.35+7.94 s | 3.27 | – |
| VIAVianden | 34.5 | 106 | 08:39:45.55+6.14 s | 08:39:49.58+10.17 s | 4.03 | – |
| RCHRochefort | 39.6 | 292 | 08:39:46.27+6.86 s | 08:39:51.29+11.88 s | 5.02 | – |
| HOUHouvegnez | 41.4 | 27 | 08:39:46.73+7.32 s | 08:39:51.20+11.79 s | 4.47 | – |
| WLFWalferdange | 49.6 | 143 | 08:39:48.02+8.61 s | 08:39:54.18+14.77 s | 6.16 | – |
| CLAClavier | 54.0 | 325 | 08:39:48.32+8.91 s | – | – | – |
| MRGMont Rigi | 59.3 | 24 | 08:39:49.88+10.47 s | 08:39:56.37+16.96 s | 6.49 | – |
| GESGesves | 61.6 | 311 | 08:39:49.24+9.83 s | 08:39:57.87+18.46 s | 8.63 | – |
| MEMHMembach | 67.9 | 16 | 08:39:51.43+12.02 s | – | – | – |
| MRDMaredsous | 76.1 | 294 | 08:39:52.95+13.54 s | 08:40:01.84+22.43 s | 8.89 | – |
| DOUDourbes | 82.4 | 276 | 08:39:53.12+13.71 s | 08:40:01.99+22.58 s | 8.87 | 4.4 |
| EBNEben-Emael | 86.2 | 357 | 08:39:55.50+16.09 s | – | – | – |
| SKQSteenkerque | 137.2 | 301 | 08:40:02.08+22.67 s | 08:40:19.74+40.33 s | 17.66 | – |