BASTOGNE (BE)
Quarry blast14 August 2019
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 17:50:362019-08-14
- UTC
- 15:50:362019-08-14
Main parameters
| Date and time | 2019-08-14 15:50:36 UTC 2019-08-14 17:50:36 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.015° N, 5.740° E Uncertainty ± 2.1 km |
| Event ID | ROB 8540 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-08-14 17:58:31 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
- 20
- Epicentral distance
- 28.1 – 137.6km
- Mean velocity, P wave
- 5.5km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 15 measurements, root-mean-square deviation 0.31 s. S wave: 4 measurements, root-mean-square deviation 0.15 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)18 stations | |||||
| KLBKalborn | 28.1 | 70 | 15:50:40.33+4.18 s | – | – |
| VIAVianden | 34.3 | 105 | 15:50:41.89+5.74 s | 15:50:45.74+9.59 s | 3.85 |
| RCHRochefort | 39.9 | 293 | 15:50:42.50+6.35 s | 15:50:47.64+11.49 s | 5.14 |
| HOUHouvegnez | 42.2 | 27 | 15:50:43.01+6.86 s | – | – |
| WLFWalferdange | 49.0 | 143 | 15:50:44.53+8.38 s | – | – |
| CLAClavier | 54.7 | 325 | 15:50:45.22+9.07 s | – | – |
| MRGMont Rigi | 60.1 | 23 | 15:50:46.03+9.88 s | 15:50:53.33+17.18 s | 7.30 |
| MEMSMembach | 68.8 | 16 | 15:50:47.73+11.58 s | – | – |
| MEMHMembach | 68.8 | 16 | 15:50:47.73+11.58 s | 15:50:56.19+20.04 s | 8.46 |
| LCHLa Chartreuse | 70.1 | 352 | 15:50:48.27+12.12 s | – | – |
| MRDMaredsous | 76.4 | 295 | 15:50:49.36+13.21 s | – | – |
| DOUDourbes | 82.5 | 277 | 15:50:49.68+13.53 s | – | – |
| EBNEben-Emael | 87.1 | 357 | 15:50:51.95+15.80 s | – | – |
| OPTBOpitter | 122.2 | 357 | 15:50:57.40+21.25 s | – | – |
| RQRRonquières | 126.3 | 302 | 15:50:57.60+21.45 s | – | – |
| UCCBUccle | 131.1 | 312 | 15:50:58.74+22.59 s | – | – |
| BOUBougnies | 134.7 | 289 | 15:50:58.91+22.76 s | – | – |
| SKQSteenkerque | 137.6 | 301 | 15:50:59.56+23.41 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 84.4 | 9 | 15:50:50.47+14.32 s | – | – |
| VKBValkenburg | 94.8 | 2 | 15:50:52.85+16.70 s | – | – |