Huge Explosion on the Farside of the Sun

Posted: February 20, 2022 by oldbrew in Solar physics

The culprit could be coming into view in the next day or so.

Feb. 17, 2022: New images from the Solar and Heliospheric Observatory (SOHO) are giving us a better look at yesterday’s farside explosion. SOHO coronagraphs recorded the most dramatic CME in years:

No, there won’t be a geomagnetic storm. The explosion happened on the farside of the sun, so the CME is heading away from Earth. We dodged a bullet.

Some readers have asked “How strong was the underlying solar flare?” We don’t know. Solar flares are classified by their X-ray output, but there are no spacecraft on the farside of the sun with X-ray sensors. Best guess: It was an X-flare.

You might suppose that the farside of the sun is hidden from view. However, researchers using a technique called “helioseismology” can make crude maps of the sun’s hidden hemisphere. Their latest map reveals a huge farside active region:

The black blob is a sunspot group–a big one–and…

View original post 138 more words

  1. pochas94 says:

    The Hall effect. Harness that and we’re really going places.

  2. tallbloke says:

    Great to see predictions. Keep ’em coming.

    Here’s how our model prediction made in 2013 is doing.

  3. oldbrew says:

    Planetary K-index
    Now: Kp= 5 storm
    24-hr max: Kp= 5 storm

    3-day chart…

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