BASTOGNE (BE)
Quarry blast13 February 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 15:06:372020-02-13
- UTC
- 14:06:372020-02-13
Main parameters
| Date and time | 2020-02-13 14:06:37 UTC 2020-02-13 15:06:37 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.036° N, 5.782° E Uncertainty ± 0.9 km |
| Event ID | ROB 9280 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-02-14 09:07:57 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
- 15
- Epicentral distance
- 24.5 – 139.1km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.4km/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: 12 measurements, root-mean-square deviation 0.44 s. S wave: 6 measurements, root-mean-square deviation 0.42 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)14 stations | |||||
| KLBKalborn | 24.5 | 73 | 14:06:42.03+4.33 s | 14:06:45.45+7.75 s | 3.42 |
| HOUHouvegnez | 38.8 | 24 | 14:06:44.64+6.94 s | – | – |
| RCHRochefort | 41.9 | 289 | 14:06:44.31+6.61 s | 14:06:49.64+11.94 s | 5.33 |
| CLAClavier | 54.7 | 321 | 14:06:47.20+9.50 s | 14:06:54.40+16.70 s | 7.20 |
| MRGMont Rigi | 56.8 | 21 | 14:06:47.98+10.28 s | 14:06:55.14+17.44 s | 7.16 |
| GESGesves | 63.0 | 308 | 14:06:49.02+11.32 s | – | – |
| MEMSMembach | 65.8 | 14 | 14:06:49.41+11.71 s | – | – |
| MEMHMembach | 65.8 | 14 | 14:06:49.41+11.71 s | 14:06:57.02+19.32 s | 7.61 |
| MRDMaredsous | 78.3 | 293 | 14:06:51.06+13.36 s | 14:07:00.50+22.80 s | 9.44 |
| DOUDourbes | 85.3 | 275 | 14:06:51.37+13.67 s | – | – |
| TGATangissart | 109.8 | 306 | 14:06:56.48+18.78 s | – | – |
| RQRRonquières | 127.8 | 300 | 14:06:59.82+22.12 s | – | – |
| UCCBUccle | 131.9 | 310 | 14:07:00.45+22.75 s | – | – |
| SKQSteenkerque | 139.1 | 300 | 14:07:01.59+23.89 s | 14:07:18.85+41.15 s | 17.26 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 81.7 | 7 | 14:06:52.19+14.49 s | – | – |