Abstract
Solar activity has been found to be strongly correlated with some geophysical processes on the Earth system. In the present paper, using global dust veil index of volcanic eruptions and sunspot numbers indicating solar activity, the authors investigate the possible influence of solar activity on global volcanicity during 1700–1995. Results of wavelet analysis indicate that variations of global volcanicity have remarkable temporal characteristics, and it is high related to solar activity on about 11-year cycle, with exceeding the 5% statistical significance level against red noise.
Highlights
The Earth system is dominated by electric-magnetic radiation, partial radiation, and solar cosmic rays from the Sun
Some studies show solar activity relates to geophysical processes to some extent
The cross wavelet transform (XWT) of two series xn and yn is defined as WXY=WXWY*, and the cross wavelet power is defined as |WXY|
Summary
The Earth system is dominated by electric-magnetic radiation, partial radiation, and solar cosmic rays from the Sun. Some studies show solar activity relates to geophysical processes (including some natural hazards phenomena, such as earthquake, volcanic eruption and magnetic storm) to some extent. Magnetic storms during maximum years of solar activity may affect property of faults and gestate great earthquakes in some region (Han et al, 2004). Love and Thomas (2013) studied statistically solar-terrestrial interaction between earthquakes and solar activity. Every volcanic eruption will emit a lot of lava, tephra and gases This brings out many environmental problems, including greenhouse effect, ozone hole and acid rain. Some studies showed there is close relationship among volcanic eruption, earthquake, solar activity and climatic change (Schneider et al, 1975; Kelly et al, 1996; Mann et al, 1998; Stenni et al, 2002). The authors apply wavelet technique to investigate possible connection between global volcanicity and solar activity
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