TOURNAI (BE)
Quarry blast29 May 2017
- Magnitude
- 1.9ML
- Depth
- 9.8km ± 4.3
- Belgian time
- 13:01:192017-05-29
- UTC
- 11:01:192017-05-29
Main parameters
| Date and time | 2017-05-29 11:01:19 UTC 2017-05-29 13:01:19 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.660° N, 3.422° E Uncertainty ± 3.6 km |
| Depth of hypocenter | 9.8 ± 4.3 km |
| Event ID | ROB 5726 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-05-29 13:23:23 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
- 30.3 – 136.0km
- Mean velocity, P wave
- 5.9km/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 9.8 km. P wave: 8 measurements, root-mean-square deviation 0.31 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)11 stations | ||||||
| LESLessines | 30.3 | 79 | 11:01:25.63+5.73 s | 11:01:29.53+9.63 s | 3.90 | 76.0 |
| SKQSteenkerque | 46.6 | 91 | 11:01:27.79+7.89 s | 11:01:33.24+13.34 s | 5.45 | – |
| BOUBougnies | 47.8 | 129 | 11:01:28.14+8.24 s | – | – | – |
| BRQBracquegnies | 54.4 | 111 | 11:01:28.90+9.00 s | 11:01:36.56+16.66 s | 7.66 | – |
| RQRRonquières | 57.2 | 96 | 11:01:29.22+9.32 s | – | – | – |
| SNFSeneffe | 63.3 | 105 | 11:01:30.20+10.30 s | – | – | – |
| MRDMaredsous | 103.5 | 112 | 11:01:37.81+17.91 s | – | – | – |
| DOUDourbes | 104.5 | 127 | 11:01:37.41+17.51 s | – | – | – |
| GESGesves | 122.0 | 104 | 11:01:40.28+20.38 s | – | – | – |
| DSLBDessel | 131.8 | 61 | 11:01:42.53+22.63 s | – | – | – |
| CLAClavier | 136.0 | 101 | 11:01:42.55+22.65 s | – | – | – |