4, 2024, the Arctic stratosphere is too warm for Type II polar stratospheric clouds. NASA's MEERA-2 climate model predicts when the air up there is cold enough: Credit: SDO/AIAĬolorful Type II polar stratospheric clouds (PSC) form when the temperature in the stratosphere drops to a staggeringly low -85C. Solar wind flowing from this minor coronal hole could graze Earth's magnetic field on Jan. Switch to: Europe, USA, New Zealand, Antarctica Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining-a result of the yin-yang relationship between the solar cycle and cosmic rays. Credit: SDO/HMIĬosmic Rays Solar Cycle 25 is intensifying, and this is reflected in the number of cosmic rays entering Earth's atmosphere. Sunspot AR3536 has a 'beta-gamma' magnetic field that poses a threat for strong M-class solar flares.
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