Current Science

The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader).

If you would like more information about how to print, save, and work with PDFs, Highwire Press provides a helpful Frequently Asked Questions about PDFs.

Alternatively, you can download the PDF file directly to your computer, from where it can be opened using a PDF reader. To download the PDF, click the Download link above.

Fullscreen Fullscreen Off


Ground-based GPS data show the presence of earthquake precursor in the form of perturbation in TEC of the ionosphere. The analysis of data for Tamenglong Earthquake (M = 6.7, 3 January 2016) from the stations at Lhasa, China (29.65°N, 91.10°E), Hyderabad, India (17.41°N, 78.55°E), and Patumwan, Thailand (13.73°N, 100.53°E) for the duration of 5-days before and after the main shock of the earthquake show large enhancement and decease in TEC. The results for Lhasa station which lies in the Earthquake preparation zone showed a decrease in TEC on 29 December (-37%) and 30 December (-9%) which is followed by an enhancement in TEC (47%) on 31 December, i.e. 3 days before the main shock. After the main shock negative ionospheric perturbation has been observed on 4, 5 and 7 January 2016 with a reduction of 20%, 32% and 24% respectively. Stations lying outside preparation zone (Patumwan and Hyderabad) did not show any ionospheric precursor.

Keywords

Earthquake, GPS TEC, Ionosphere, Seismo-Electromagnetic.
User
Notifications
Font Size