TOURNAI (BE)
Quarry blast11 February 2019
- Magnitude
- 2.3ML
- Depth
- –
- Belgian time
- 12:27:042019-02-11
- UTC
- 11:27:042019-02-11
Main parameters
| Date and time | 2019-02-11 11:27:04 UTC 2019-02-11 12:27:04 Belgian time |
|---|---|
| Magnitude | ML 2.3 |
| Epicentral coordinates | 50.615° N, 3.278° E Uncertainty ± 4.4 km |
| Event ID | ROB 7820 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-02-11 12:59:49 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
- 56.9 – 209.4km
- Mean velocity, P wave
- 5.7km/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: 7 measurements, root-mean-square deviation 0.30 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 | |||||
| SKQSteenkerque | 56.9 | 86 | 11:27:13.16+9.07 s | – | – |
| BRQBracquegnies | 62.6 | 103 | 11:27:14.38+10.29 s | – | – |
| ZEVZevekote | 63.9 | 336 | 11:27:14.97+10.88 s | – | – |
| RQRRonquières | 67.0 | 90 | 11:27:15.94+11.85 s | – | – |
| OSTBOostende | 73.3 | 341 | 11:27:16.29+12.20 s | – | – |
| UCCBUccle | 79.1 | 75 | 11:27:17.36+13.27 s | 11:27:25.28+21.19 s | 7.92 |
| DOUDourbes | 110.1 | 121 | 11:27:22.86+18.77 s | 11:27:36.20+32.11 s | 13.34 |
| GESGesves | 130.9 | 101 | 11:27:25.78+21.69 s | 11:27:41.72+37.63 s | 15.94 |
| DSLSDessel | 143.2 | 61 | 11:27:28.67+24.58 s | – | – |
| DSLBDessel | 143.2 | 61 | 11:27:28.86+24.77 s | – | – |
| CLAClavier | 145.2 | 98 | 11:27:28.02+23.93 s | 11:27:46.81+42.72 s | 18.79 |
| RCHRochefort | 147.8 | 110 | 11:27:29.50+25.41 s | 11:27:47.39+43.30 s | 17.89 |
| MRGMont Rigi | 198.5 | 92 | 11:27:35.61+31.52 s | – | – |
| KLBKalborn | 209.4 | 105 | 11:27:37.53+33.44 s | 11:28:00.61+56.52 s | 23.08 |
| VITO (Mol)1 station | |||||
| MOL2AMol | 143* | – | – | 11:27:48.60+44.51 s | – |
* Distance from the catalogue, rounded to the kilometre: the coordinates of the station are missing from it.