Radiation from the flare has caused a deep shortwave radio blackout over the Americas: blackout map. NASA's Solar Dynamics Observatory recorded the extreme ultraviolet flash: This is the strongest flare of Solar Cycle 25 (so far) and the most powerful eruption the sun has produced since the great storms of Sept. 14th (1702 UT), producing a strong X2.8-class solar flare. (UPDATED) STRONGEST FLARE OF THE CURRENT SOLAR CYCLE: Sunspot 3514 erupted on Dec. Subscribers to our Space Weather Alert Service will receive an instant text message when the CME strikes. 17th when the CME from yesterday's X2.8-class flare arrives. Storm levels could escalate to category G2 (Moderate) or G3 (Strong) on Dec. 15th or 16th in response to an incoming solar wind stream with a stealthy CME embedded in it. GEOMAGNETIC STORM WATCH (G1-G3): Minor G1-class geomagnetic storms are possible on Dec. 28, 2023, as a show of thanks for years of service and hope for future daisies: Until then, we will maintain AIM's iconic 'daily daisy,' frozen at Feb. There may be some hope of a recovery as AIM's orbit precesses into full sunlight in 2024. As a result AIM is offline, perhaps permanently. What happened to NASA's AIM spacecraft, which has been monitoring NLCs since 2007? Earlier this year, the spacecraft's battery failed. As the season progresses, these dots will multiply in number and shift in hue from blue to red as the brightness of the clouds intensifies.

For the rest of the season, daily maps from NOAA 21 will be presented here:Įach dot is a detected cloud. An instrument onboard NOAA 21 ( OMPS LP) is able to detect NLCs (also known as 'polar mesospheric clouds' or PMCs). The first clouds were detected inside the Arctic Circle by the NOAA 21 satellite. The northern season for NLCs began on May 26th. Solar wind flowing from this coronal hole could reach Earth on Dec. 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 AR3514 poses a threat for strong X-class solar flares.

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