Top 25 sunspot regions of 2018

On this page you will find an overview of the largest sunspot regions of the year 2018. This page is updated daily. Sunspot information comes from the NOAA SWPC.

RegionSize Number of
sunspots
Class Magn. Class Spot
12018/02/11269924025DAI
22018/06/22271516013DAO
32018/04/23270613010DAO
42018/08/2627201007DAO
52018/05/2927128010CSI
62018/06/222713708DSO
72018/05/252711606CAI
82018/11/182727603CAO
92018/12/072729507CRO
102018/06/202714405CAO
112018/08/242719405CRO
122018/10/012723304DRO
132018/05/052708303CRO
142018/01/172696303CRO
152018/02/272700306CRO
162018/04/132704303BXO
172018/10/132724201HRX
182018/01/052693203CRO
192018/05/222710202CRO
202018/11/252728204BXO
212018/08/182718201HRX
222018/09/122722104BXO
232018/04/222707101AXX
242018/05/092709102AXX
252018/10/142725101AXX

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Last X-flare2026/06/03X1.0
Last M-flare2026/06/21M6.9
Last geomagnetic storm2026/06/25Kp5 (G1)
Spotless days
Last 365 days3 days
20263 days (2%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
May 2026101.4 +22.1
June 2026100.5 -0.9
Last 30 days105.1 +6.4

This day in history*

Solar flares
11999M1.47
21998M1.34
32000M1.33
42023M1.2
52023C9.7
DstG
11967-73G1
21960-64G3
31978-58
41970-53G2
52000-53
*since 1994

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