At 4:55 pm Eastern Time on December 31, 2023, the sun released a strong solar flare. NASA's Solar Dynamics Observatory continues to observe the sun and captured images of the event. A solar flare is a powerful burst of energy. Flares and solar outbursts can affect radio communications, power grids, navigation signals, and pose a threat to spacecraft and astronauts.
This flare is classified as an X5.0 flare. The X rating represents the most intense flare, and the number provides more information about its intensity.
The National Oceanic and Atmospheric Administration's Space Weather Prediction Center provides more details:
At 31/2155 UTC, an X5.0 flare (R3 strong radio blackout) occurred in the NOAA/SWPC3536 region. This flare came from the same area that produced the X2.8 flare on December 14, 2023. This is also the largest flare observed since the X8.2 flare that occurred on September 10, 2017. Although with low confidence, coronal mass ejection (CME) modeling associated with the event identified the possibility of a close-range impact near Earth as early as January 2. To this end, a G1 (minor) geomagnetic storm warning effective January 2 has been issued.
A solar flare is a sudden burst of intense radiation from the sun's surface, usually near a sunspot. These flares are caused by the release of magnetic energy stored in the sun's atmosphere. This energy heats solar material to tens of millions of degrees, causing it to emit gamma rays, X-rays and ultraviolet radiation.
Solar flares are mainly divided into three categories based on their intensity: Class C, Class M and Class X.
Class C flares: These are small flares that have the least impact on Earth. They are common and occur frequently during periods of high solar activity.
M-class flares: These are medium-sized flares that can cause brief radio blackouts and minor radiation storms at the poles that could endanger astronauts.
Class X flares: These flares are the most powerful type and can trigger Earth-wide radio blackouts and long-lasting radiation storms. They are often accompanied by coronal mass ejections (CMEs), which can have a significant impact on the Earth's magnetosphere and geomagnetic field.
The power of each level of flare is ten times that of the previous level, and the power of each level of flare is divided into levels 1 to 9. For example, the X5 flare is five times more powerful than the X1 flare.
NASA's Solar Dynamics Observatory (SDO) is a space mission launched in February 2010 as part of the Living with the Stars (LWS) program. The primary goal of the Solar Dynamics Observatory is to understand the impact of the Sun on the Earth and near-Earth space by studying the solar atmosphere at multiple wavelengths simultaneously on small scales of space and time.
The Sun-Synchronous Orbiting Observatory is equipped with a suite of instruments that provide a more complete understanding of solar dynamics through observations:
Atmospheric Imaging Assembly (AIA): Captures images of the solar atmosphere at multiple wavelengths, linking surface changes to internal changes.
Helioseismic and Magnetic Imager (HMI): Study the Sun's magnetic field and generate data to determine the internal sources of solar variability.
Extreme Ultraviolet Variability Experiment (EVE): High-precision measurements of the Sun’s extreme ultraviolet irradiance, which is important for understanding the effects on Earth’s atmosphere.
By continuously monitoring the Sun, SDO helps scientists learn more about solar activity and how it affects Earth, playing a vital role in our ability to predict space weather events.
Compiled source: ScitechDaily