| Autor: |
Arti Bhardwaj, Ankit Gupta, Qadeer Ahmed, Anshul Singh, Sumedha Gupta, S. Sarkhel, M. V. Sunil Krishna, Duggirala Pallamraju, Tarun Pant, A. K. Upadhayaya |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Frontiers in Astronomy and Space Sciences, Vol 10 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2296-987X |
| DOI: |
10.3389/fspas.2023.1170288 |
| Popis: |
We have examined ionospheric response to eleven earthquake events measuring less than four on the Richter scale during the year 2020 that occurred in the vicinity of New Delhi (28.6°N, 77.2°E, 42.4°N dip). We have used ionogram traces, manually scaled critical ionospheric layer parameters using SAO explorer obtained from Digisonde along with the O(1D) airglow observations from a multi-wavelength all-sky airglow imager installed at Hanle, Ladakh, India (32.7°N, 78.9°E, 24.1°N dip). Perceptible ionospheric perturbations 2–9 days prior to these earthquake events resulting in more than 250% variation in electron density are observed. We found distortion of ionogram trace in the form of Y forking majorly at New Delhi on the precursor day and after the earthquake event. Traces of Y forked ionograms were also observed at Ahmedabad (23°N, 72°E, 15°N dip) and Trivandrum (8.5°N, 76.9°E, 0.5°N dip). These Y-forked ionograms are one of the first observations during any earthquake events and are looked at as a signature of Travelling Ionospheric Disturbances (TIDs). |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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