Read on Wikipedia

Image: NASA · Public domain

Sunspot number

Sunspot number

Measure of sunspot activity.

Rare
20 views/day0 owners

No account needed. By playing, you confirm you're 13 or older and agree to the Terms of use.

No owners yet

RareTop 25%

Category: Empty

0 owners
0 copies
0 pulls
Wishlisted
0
In 0 albums
On 0 showcases
Market listings
0
Wikipedia views per dayLast 30 days 570

Not sold on the market yet.

Readers' pathsAug 2026 – Oct 2026

Readers go next to

Share of the 325 clicks on its links

  1. Sunspot

    Temporary spots on the Sun's surface.

    30%

  2. Solar cycle

    Periodic change in the Sun's activity.

    22%

  3. Joy's law (astronomy)

    Empirical law for solar active regions.

    15%

  4. STEREO

    Solar observation mission (2006–present).

    14%

  5. Rudolf Wolf

    Swiss astronomer and mathematician (1816–1893).

    3.1%

Readers come from

Share of the 530 readers arriving from another article

  1. Year Without a Summer

    1816 volcanic winter climate event.

    25%

  2. Sunspot

    Temporary spots on the Sun's surface.

    12%

  3. Solar cycle 25

    Solar activity from 2019 to about 2030.

    12%

  4. Solar cycle 10

    Solar activity from December 1855 to March 1867.

    11%

  5. Maunder Minimum

    Period of low solar activity, 1645–1715.

    10%

  6. Solar cycle

    Periodic change in the Sun's activity.

    7.5%

  7. Solar cycle 24

    Solar activity from December 2008 to December 2019.

    4.9%

  8. Crangon crangon

    Species of shrimp.

    4.7%

  9. Gnevyshev–Ohl rule

    Astronomical rule.

    2.8%

One quick check

Tap the box to show you're not a bot.