TOURNAI (BE)
Quarry blast9 November 2018
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 13:01:382018-11-09
- UTC
- 12:01:382018-11-09
Main parameters
| Date and time | 2018-11-09 12:01:38 UTC 2018-11-09 13:01:38 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.591° N, 3.460° E Uncertainty ± 1.8 km |
| Event ID | ROB 7395 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-11-21 15:22:25 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
- 41.1 – 163.8km
- 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: 9 measurements, root-mean-square deviation 0.33 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)15 stations | |||||
| BOUBougnies | 41.1 | 123 | 12:01:45.83+7.02 s | – | – |
| SKQSteenkerque | 44.4 | 81 | 12:01:45.98+7.17 s | 12:01:51.99+13.18 s | 6.01 |
| BRQBracquegnies | 49.5 | 104 | 12:01:47.16+8.35 s | – | – |
| RQRRonquières | 54.2 | 88 | 12:01:47.52+8.71 s | – | – |
| UCCSUccle | 67.6 | 70 | 12:01:49.61+10.80 s | – | – |
| OSTBOostende | 80.7 | 333 | 12:01:52.55+13.74 s | 12:02:02.84+24.03 s | 10.29 |
| DOUDourbes | 97.9 | 124 | 12:01:55.72+16.91 s | 12:02:07.98+29.17 s | 12.26 |
| MRDMaredsous | 98.3 | 109 | 12:01:55.28+16.47 s | – | – |
| GESGesves | 117.7 | 101 | 12:01:59.61+20.80 s | – | – |
| CLAClavier | 132.1 | 98 | 12:02:01.56+22.75 s | 12:02:17.94+39.13 s | 16.38 |
| DSLBDessel | 133.5 | 57 | 12:02:01.56+22.75 s | – | – |
| MOLSMol | 133.6 | 58 | 12:02:01.85+23.04 s | – | – |
| RCHRochefort | 134.8 | 110 | 12:02:01.99+23.18 s | 12:02:19.22+40.41 s | 17.23 |
| LCHLa Chartreuse | 151.5 | 87 | 12:02:04.39+25.58 s | – | – |
| OPTBOpitter | 163.8 | 68 | 12:02:06.06+27.25 s | – | – |