COUVIN (BE)
Quarry blast16 January 2019
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 14:00:372019-01-16
- UTC
- 13:00:372019-01-16
Main parameters
| Date and time | 2019-01-16 13:00:37 UTC 2019-01-16 14:00:37 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.023° N, 4.482° E Uncertainty ± 1.8 km |
| Event ID | ROB 7645 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-16 16:01:29 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
- 11
- Epicentral distance
- 11.3 – 139.2km
- 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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 6 measurements, root-mean-square deviation 0.17 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)9 stations | |||||
| DOUDourbes | 11.3 | 45 | 13:00:39.61+2.43 s | 13:00:40.49+3.31 s | 0.88 |
| MRDMaredsous | 37.1 | 33 | 13:00:44.13+6.95 s | 13:00:48.46+11.28 s | 4.33 |
| RCHRochefort | 55.3 | 74 | 13:00:46.80+9.62 s | – | – |
| BOUBougnies | 55.9 | 317 | 13:00:46.88+9.70 s | – | – |
| BRQBracquegnies | 56.6 | 334 | 13:00:46.76+9.58 s | – | – |
| HOUHouvegnez | 114.8 | 71 | 13:00:56.65+19.47 s | – | – |
| WLFWalferdange | 126.5 | 108 | 13:00:58.43+21.25 s | – | – |
| MEMHMembach | 126.8 | 58 | 13:00:58.75+21.57 s | – | – |
| MOLTMol | 139.2 | 18 | 13:01:01.23+24.05 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| VKBValkenburg | 131.8 | 44 | 13:00:59.41+22.23 s | – | – |
| HGNHeimansgroeve | 131.9 | 51 | 13:00:59.96+22.78 s | – | – |