News Letter from Tacoma Radio Club. Solar Cycle 25 is now officially past the peak of solar activity. https://w7dk.org The lead article is a discussion about how to prepare for the declining solar cycle. “During daytime the D-layer absorption becomes weaker, this allows 40 meters to open earlier in the afternoon. At night, the F-layerContinue reading “Solar Cycle 25 Declining”
Category Archives: Space Weather
Amateur Radio Day POTA Haul
On Saturday April 18th, an immense Solar Coronal hole was pointed directly at earth. HF Conditions Suffered. Members still got out the weather being genuinely fine. Here are their briefings N6BLU: The absolute toughest conditions were had at the beginning of the clubs POTA today. Never has it taken so long to get that firstContinue reading “Amateur Radio Day POTA Haul”
Ionosphere Linked to Earthquakes
Could ionospheric disturbances influence earthquakes? Researchers at Kyoto University explored how disturbances in the ionosphere exert electrostatic forces within Earth’s crust. They found that such forces potentially contribute to the initiation of large earthquakes under specific conditions. The coincidence of strong solar flare activity with the 2024 Noto Peninsula earthquake supports the hypothesis that ionosphericContinue reading “Ionosphere Linked to Earthquakes”
First Gen SigInt Sat Declassified
The NRO has declassified JUMPSEAT, the U.S.’s first-generation signals-collection satellite, which operated from 1971 to 1987. Developed under Project EARPOP, it collected critical electronic emissions and intelligence during the Cold War. The data supported national security agencies, showcasing the NRO’s ongoing commitment to innovation in space for national safety.
“Full Halo” CME Headed to Earth
Solar atmospheric blast erupted from the sun on Saturday. Expected to impact Earth’s magnetic field later today. The impressive full-halo coronal mass ejection (CME) blasted X-rays and material into space. Sky watchers may see aurora as far south as Illinois. https://www.space.com/stargazing/auroras/northern-lights-may-be-visible-in-these-18-us-states-sept-1-2-2025 Actual X-rays, CME – Aurora Watch
Coos County Radio Club 