RUS↔ENG

Active areas

Sep 18, 2019 London
Previous day Next day
sunspots

Sunspots and active regions

No sunspots and sunspot groups can be currently observed on the Sun's surface

H-alpha plages without spots

No H-alpha plages without spots can be currently observed on the Sun's surface

Solar cycle progression

Average monthly sunspot number (SSN) from 1990, January to 2019, September. Gray background - average solar cycle.
Average monthly sunspot number (SSN) from 1990, January to 2019, September