a TID as the cause of a SC have never been reported. To address this challenge we analyze the simultaneous-observed solar dynamic spectra and detrended total electron content (dTEC) maps, which have been used as an effective tool in TIDs studies [@Tsugawa2007; @Otsuka2013] since pioneering work of @Saito1998. An event on 2014 January 8 has been selected. The following section \[Sect:Observations and Methods\] describes the instruments, data and methodology, our results are given in section \[Sect:Results\], and the latest section \[Sect:Summary and Discussion\] presents the summary and discussion.

Instruments, Observational Data and Methodology {#Sect:Observations and Methods}
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Solar Radio Instruments
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The solar radio observations on 2014 January 8 were conducted by many ground-based instruments in Europe. We picked out only those records with clear SCs, by the following radio astronomical facilities:

-   NDA (location: Nançay, France; coords: $\phi_0 = 47.38^\circ$, $\lambda_0 = 2.193^\circ$; frequency band: 10-80 MHz; aerial: phased array consisting of 144 elements)) [@Lecacheux2000];

-   URAN-2 (location: Stepanovka, Ukraine; coords: $\phi_0 = 49.63^\circ$, $\lambda_0 = 34.825^\circ$; frequency band: 8-33 MHz; aerial: phased array consisting of 512 elements)) [@Konovalenko2016];

-   IZMIRAN observatory (location: Troitsk, Russia; coords: $\phi_0 = 55.482^\circ$, $\lambda_0 = 37.31^\circ$; frequency band: 25-270 MHz; aerial: 10-meter dish, 