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  • 1
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    The Effect of Recent Venus Transit on Earth’s Atmosphere (2006)
    Details
    Publication Date: 2019-11-04
    Description: Some experiments on June 8, 2004, the day of transit of Venus across the Sun, were undertaken at Kolkata (latitude: 23034 N) to observe effect, if any, of transit of Venus on FWF, ELF and VLF amplitudes. The result shows good correlation between their temporal variations during the transit. The observation was unbelievable as the Venus subtends only 1/32th of the cone subtended by Sun on Earth. This anomaly may be explained on the assumption that the height of Venusian atmosphere with high content of CO2, and nitrogen which absorbs electromagnetic and corpuscular radiations from Sun, depleting the solar radiation reaching the Earth to a considerable extent. As a result, relevant parameters of Earth’s atmosphere are modulated and here we show how these changes are reflected in identical behaviour of fair weather field and ELF and VLF spectra.
    Description: JCR Journal
    Description: open
    Keywords: Venus transit ; effects on atmospheric electric parameters ; 01. Atmosphere::01.01. Atmosphere::01.01.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 1569280 bytes
    Format: application/msword
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  • 2
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    The effect of recent Venus transit on Earth’s atmosphere (2007)
    Details
    Publication Date: 2019-11-04
    Description: Some experiments on June 8, 2004, the day of transit of Venus across the Sun, were undertaken at Kolkata (latitude: 22°34lN) to observe the effect, if any, of transit of Venus on FWF, ELF and VLF amplitudes. The result shows a good correlation between their temporal variations during the transit. The observation was unbelievable as the Venus subtends only 1/32th of the cone subtended by Sun on Earth. This anomaly may be explained on the assumption that the height of Venusian atmosphere with high content of CO2, and nitrogen which absorbs electromagnetic and corpuscular radiations from Sun, depleting the solar radiation reaching the Earth to a considerable extent. As a result, relevant parameters of Earth’s atmosphere are modulated and here we show how these changes are reflected in identical behaviour of fair weather field and ELF and VLF spectra.
    Description: JCR Journal
    Description: open
    Keywords: Venus transit ; effects on atmospheric electric parameters ; 01. Atmosphere::01.01. Atmosphere::01.01.05. Radiation
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
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    Tsunami scenarios for submarine landslides in the Fram Strait (North Atlantic) (2009)
    In:  EOS, Transactions, American Geophysical Union, Fall Meeting Suppl. 90, 52
    Details
    Publication Date: 2020-02-12
    Description: The present geological setting west of Svalbard closely parallels the situation off mid-Norway after the last glaciation, when crustal unloading by melting of ice induced very large earthquakes. The modern Svalbard margin is characterized by an active fluid flow system in continental margin sediments consisting of inter-layered contourite deposits and glacigenic debris flows. Both unloading earthquakes and overpressures have been identified as key factors causing several mega-landslides off Norway during early Holocene deglaciation. The most prominent event was the Storegga Slide 8200 years BP which caused a tsunami up to 23 m high on the Faroe and Shetland islands. Numerical tsunami modeling indicates a smaller (100 m high and 130 km wide) submarine landslide west of Svalbard, which is consistent with the geological information available for the area, would cause a tsunami capable of reaching northwest Europe and threatening coastal areas. Although newly collected seismic data do not show clear precursors to incipient slope failure it may be sensible to install a tsunami warning system based on tilt-meters, which would give a warning time of one to four hours.
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/conferenceObject
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