Sentences with phrase «sunspot group»

Here we present a new normalized series of the number of sunspot groups for the period 1749 — 1996.

In October, the area known as active region 12192 (the bright patch on the left side of the main image) spawned the largest sunspot group in 24 years.

The CME was launched from the largest sunspot group observed in the last 24 years and several additional solar flares were detected that would have impacted on Mars around this time.

This ultraviolet image of the sun shows large sunspot group AR 9169 as the bright area near the horizon.

We developed a new, robust method of hemispheric wing separation based on an analysis of long gaps in sunspot group occurrence in different latitude bands.

Not a cloud crossed the powder blue sky, allowing a spectacular view of a surprisingly large sunspot group followed by several ruby red prominences during totality.

He offered, by way of compensation, a photograph from April 6, 1947, of the largest sunspot group ever observed from Mount Wilson.

The Solar and Heliospheric Observatory's Extreme Ultraviolet Telescope captured these explosions, which were triggered by a series of solar flares over sunspot group 9236, near the center of the sun's Earth - facing disk.

The monster sunspot group AR 1476 (upper left) measures more than 60,000 miles from end to end.

The planetary lineup of that period is very similar to today and their revised sunspot group SC4 could mirror SC24.

Most solar flares and coronal mass ejections originate in magnetically active regions around visible sunspot groupings.

The occurrence of sunspot groups depicts a systematic long - term variation between the two hemispheres.

The reconstruction is based on the active day fraction (ADF) method, which is slightly updated with respect to previous works, and a revised database of sunspot group observations.

Portions of sunspot groups can shift over time.

Large sunspot group AR 9169 moved across the sun during September 2000.

At one point, sunlight dimmed 0.3 percent for about four days, due mostly to three large sunspot groups.

In November 1978, when I first started, we were at solar maximum, and one day I had 23 sunspot groups to draw.

The sunspot grouping in the upper right of the sun's disk is known as Active Region 1402, a sunspot region responsible for recent solar storms.

Sunspot groups have a magnetic field with a north and a south pole, and, in each 11 - year rise and fall, the same polarity leads in a given hemisphere, while the opposite polarity leads in the other.

Seven sunspot groups are recorded with the overall sunspot area increasing.

As the process continues and magnetic flux strength of the sunspot group declines, the lifetime of a sunspot group (of the few sunspot groups that do form) has decreased to where we are now at the point that a sunspot group's lifetime is for a number of cases only a few days.

The method makes it possible to ascribe each sunspot group to a certain wing (solar cycle and hemisphere), and separate the old and new cycle during their overlap.

Here we present a study of the butterfly diagram of sunspot group occurrence for cycles 7 — 10 and 11 — 23 using data from a recently digitized sunspot drawings by Samuel Heinrich Schwabe in 1825 — 1867, and from RGO / USAF / NOAA (SOON) compilation of sunspot groups in 1874 — 2015.

The new series of the sunspot group numbers with monthly and annual resolution is provided forming a basis for new studies of the solar variability and solar dynamo for the last 250 yr.

The sunspot grouping in the upper right of the sun's disk is known as Active Region 1402, a sunspot region responsible for recent solar storms.