Skip to main content

3 Result(s)

within Hiroko Miyahara Remove this filter Physics Remove this filter

and

  1. No Access

    Chapter

    Solar Activity in the Past and Its Impacts on Climate

    Solar activity is suggested to impact the climate system through the influence of total solar irradiance (TSI), solar ultraviolet (UV), and galactic cosmic rays (GCRs). This chapter reviews the variability of ...

    Hiroko Miyahara, Ayumi Asai, Satoru Ueno in Solar-Terrestrial Environmental Prediction (2023)

  2. No Access

    Article

    Historical Auroras in the 990s: Evidence of Great Magnetic Storms

    A significant carbon-14 enhancement has recently been found in tree rings for the year 994, suggesting an extremely strong and brief cosmic ray flux event. The origin of this particular cosmic ray event has no...

    Hisashi Hayakawa, Harufumi Tamazawa, Yurina Uchiyama, Yusuke Ebihara… in Solar Physics (2016)

  3. No Access

    Article

    Cyclicity of Solar Activity During the Maunder Minimum Deduced from Radiocarbon Content

    This paper presents the features of the “eleven-year” cycle of radiocarbon content during the period of prolonged sunspot minimum called the Maunder Minimum (1645–1715 AD). Whether or not the Sun had maintained t...

    Hiroko Miyahara, Kimiaki Masuda, Yasushi Muraki, Hideki Furuzawa… in Solar Physics (2004)