TOURNAI (BE)
Quarry blast3 January 2019
- Magnitude
- 2.3ML
- Depth
- –
- Belgian time
- 13:02:362019-01-03
- UTC
- 12:02:362019-01-03
Main parameters
| Date and time | 2019-01-03 12:02:36 UTC 2019-01-03 13:02:36 Belgian time |
|---|---|
| Magnitude | ML 2.3 |
| Epicentral coordinates | 50.616° N, 3.435° E Uncertainty ± 2.5 km |
| Event ID | ROB 7545 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-03 13:17:52 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
- 22
- Epicentral distance
- 30.7 – 221.2km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.3km/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 0.54 s. S wave: 6 measurements, root-mean-square deviation 0.47 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)21 stations | ||||||
| LESLessines | 30.7 | 70 | 12:02:41.97+4.98 s | 12:02:45.84+8.85 s | 3.87 | – |
| BOUBougnies | 44.1 | 125 | 12:02:44.37+7.38 s | 12:02:50.95+13.96 s | 6.58 | 90.8 |
| SKQSteenkerque | 45.8 | 85 | 12:02:44.00+7.01 s | 12:02:50.08+13.09 s | 6.08 | – |
| BRQBracquegnies | 51.9 | 107 | 12:02:45.13+8.14 s | – | – | – |
| RQRRonquières | 56.0 | 91 | 12:02:45.60+8.61 s | – | – | – |
| UCCBUccle | 68.4 | 73 | 12:02:47.68+10.69 s | – | – | – |
| ZEVZevekote | 69.1 | 327 | 12:02:46.77+9.78 s | – | – | – |
| OSTBOostende | 77.5 | 333 | 12:02:50.22+13.23 s | 12:03:00.26+23.27 s | 10.04 | – |
| DOUDourbes | 100.9 | 125 | 12:02:53.61+16.62 s | 12:03:06.58+29.59 s | 12.97 | – |
| MRDMaredsous | 100.9 | 110 | 12:02:53.44+16.45 s | 12:03:06.87+29.88 s | 13.43 | – |
| GESGesves | 120.0 | 102 | 12:02:58.23+21.24 s | 12:03:12.61+35.62 s | 14.38 | – |
| DSLBDessel | 133.6 | 58 | 12:02:59.22+22.23 s | 12:03:14.76+37.77 s | 15.54 | – |
| MOLTMol | 133.8 | 60 | 12:02:58.29+21.30 s | 12:03:16.88+39.89 s | 18.59 | – |
| CLAClavier | 134.2 | 99 | 12:02:58.73+21.74 s | 12:03:15.07+38.08 s | 16.34 | 8.5 |
| RCHRochefort | 137.4 | 111 | 12:03:00.28+23.29 s | 12:03:16.88+39.89 s | 16.60 | – |
| OPTBOpitter | 164.5 | 70 | 12:03:04.92+27.93 s | 12:03:25.10+48.11 s | 20.18 | – |
| MEMHMembach | 182.3 | 89 | 12:03:07.90+30.91 s | – | – | – |
| HOUHouvegnez | 184.7 | 98 | 12:03:06.28+29.29 s | 12:03:28.33+51.34 s | 22.05 | – |
| MRGMont Rigi | 187.4 | 93 | 12:03:06.35+29.36 s | 12:03:30.74+53.75 s | 24.39 | – |
| KLBKalborn | 198.8 | 106 | 12:03:08.55+31.56 s | 12:03:31.56+54.57 s | 23.01 | – |
| WLFWalferdange | 221.2 | 118 | 12:03:11.82+34.83 s | – | – | – |
| VITO (Mol)1 station | ||||||
| MOL2AMol | 134* | – | 12:02:59.96+22.97 s | – | – | – |
* Distance from the catalogue, rounded to the kilometre: the coordinates of the station are missing from it.