GEOMAGNETIC STORM WATCH (G1): Over the past few days, a series of M-class solar flares may have hurled multiple CMEs toward Earth. In fact, so many CMEs have left the sun since Sept. 20th, analysts are having trouble sorting them out. Somewhere between two and four appear capable of grazing Earth’s magnetic field between Sept. 23rd and Sept. 25th. Minor G1-class geomagnetic storms are possible on all those days.
Ydun Ritz (2023-09-23)
EARTH-DIRECTED CME: Yesterday, a huge magnetic filament erupted from the sun and hurled a CME almost directly toward Earth. Its arrival on Sept. 19th could spark auroras in multiple US states. Full story @ Spaceweather.com.
Ydun Ritz (2023-09-17)
ANNULAR SOLAR ECLIPSE: Mark your calendar. On Oct. 14th–just one month from today–the Moon will pass in front of the sun, producing an annular solar eclipse visible from North and South America. Maps and observing tips @ Spaceweather.com.
Ydun Ritz (2023-09-14)
NASA’s Solar Dynamics Observatory recorded a dramatic explosion near sunspot AR3425 during the late hours of Sept. 7th. Debris from the M2-category blast may be heading for Earth. NOAA analysts are currently unraveling several overlapping CMEs to determine which one, if any, might belong to this explosion.
Mike Terry to WOR iog (2023-09-08)
A HALO CME IS COMING (UPDATED): Minor G1-class geomagnetic storms are possible during the early hours of July 27th when a faint halo CME is expected to hit Earth’s magnetic field. The storm cloud was hurled toward us on July 23rd (~1530 UT) by a complex eruption involving a C5-class solar flare in sunspot AR3376 and the liftoff of a relatively nearby magnetic filament.
Ydun Ritz (2023-07-25)
A SECOND CME IS APPROACHING: Minor G1-class geomagnetic storms are likely on July 21st (1600 UT) when a CME is expected to hit Earth’s magnetic field. This would be the second day in a row a CME has struck. Yesterday’s impact was weak and did not spark a geomagnetic storm, but it might have softened up our magnetosphere for a more effective strike today.
Ydun Ritz (2023-07-21)
A SIGNIFICANT EXPLOSION ON THE SUN: Giant sunspot AR3363 finally blew its top. An hours-long explosion on July 18th hurled a massive CME into space and triggered a radiation storm around Earth. The CME might graze our planet later this week. Full story @ Spaceweather.com.
Ydun Ritz (2023-07-18)
CME IMPACT AND GEOMAGNETIC STORM: Arriving a full day earlier than expected, a CME hit Earth’s magnetic field on July 16th: data. The impact at 1920 UT caused a 20 nT jolt in the USGS’s magnetometer at Fredericksburg, Virginia, and a G1-class geomagnetic storm. More CME impacts are possible on July 17th and 18th due to multiple recent eruptions from big sunspot AR3363.
Ydun Ritz (2023-07-17)
IS A ‘CANNIBAL CME’ COMING? One CME left the sun on July 14th, followed by a second faster CME on July 15th. According to a NOAA model, the second CME will sweep up the first, forming a ‘cannibal CME‘ that hits Earth on July 18th. The impact could spark G1 to G2-class geomagnetic storms.
Ydun Ritz (2023-07-16)
A VERY ACTIVE SUNSPOT: A new hyperactive sunspot is producing M-class solar flares every few hours. This is causing shortwave radio blackouts around all longitudes of our planet. If current trends continue, an X-flare could be in the offing. Full story @ Spaceweather.com.
Ydun Ritz (2023-07-12)