TOURNAI (BE)
Quarry blast9 January 2020
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 11:16:402020-01-09
- UTC
- 10:16:402020-01-09
Main parameters
| Date and time | 2020-01-09 10:16:40 UTC 2020-01-09 11:16:40 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.598° N, 3.366° E Uncertainty ± 5.0 km |
| Event ID | ROB 9095 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-01-09 11:31:03 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
- 36.0 – 124.4km
- Mean velocity, P wave
- 5.6km/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: 10 measurements, root-mean-square deviation 0.46 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)11 stations | |||||
| LESLessines | 36.0 | 69 | 10:16:47.10+6.50 s | 10:16:51.25+10.65 s | 4.15 |
| BOUBougnies | 47.2 | 119 | 10:16:47.48+6.88 s | – | – |
| SKQSteenkerque | 50.8 | 83 | 10:16:49.49+8.89 s | 10:16:54.88+14.28 s | 5.39 |
| BRQBracquegnies | 56.1 | 103 | 10:16:50.56+9.96 s | – | – |
| RQRRonquières | 60.8 | 89 | 10:16:51.05+10.45 s | – | – |
| UCCSUccle | 73.6 | 72 | 10:16:53.55+12.95 s | – | – |
| OSTBOostende | 77.3 | 337 | 10:16:53.88+13.28 s | – | – |
| TGATangissart | 81.8 | 89 | 10:16:54.18+13.58 s | – | – |
| DOUDourbes | 103.8 | 122 | 10:16:58.85+18.25 s | – | – |
| MRDMaredsous | 104.8 | 108 | 10:16:58.88+18.28 s | – | – |
| GESGesves | 124.4 | 100 | 10:17:01.89+21.29 s | 10:17:17.82+37.22 s | 15.93 |