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A prominence erupts

A well-sized quiescent prominence erupted around noon on 12 September near the Sun's northeast limb.

Increasing sunspot numbers

An increasing number of well-sized sunspot groups are dotting the Sun.

Rise of the solar flares

Solar flaring activity was on the rise last week. NOAA 2860 produced most of the 19 C-class flares as well as the sole M-class event, whereas tiny sunspot group NOAA 2859 was the source of the most photogenic eruption.

A filament goes kaboom!

A filament that was visible for nearly a week finally erupted on 22 and 23 August.

Days without sunspots

Despite the sunspot activity being on the rise, the Sun had a few spotless days late July and early August. This is not unusual.

Triumph of the coronal dimmings

Several coronal dimmings were observed last week in solar EUV imagery. Some of the associated CMEs were thought to have a potentially earth-directed component.

High-latitude sunspot group

From 16 till 18 July, a sunspot was visible at the very high southern latitude of -43 degrees. Over the last 20 years, this was only the 2nd group to reach such high latitude.

On farside activity and proton fluxes

Some spectacular halo CMEs having their origin on the Sun's farside were associated with measurable increases in proton flux levels as recorded by near-earth satellites in the L1-point.

SWx acronyms

The STCE has created a new and dynamical webpage containing a list of currently nearly 1500 space weather acronyms.

First X-class flare of SC25

NOAA 2838 was the source of the first X-class flare of SC25. The X1.5 flare peaked at 14:29UT on 3 July.

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