Calculating the period of the sunspot cycle - L3Harris Geospatial
10:30 AM | *Now entering a deep solar minimum and the latest forecast for solar cycle 25 suggests it may be the weakest cycle in 200 years* — Arcfield Weather
climate4you Sun
Sunspot number revisions. Yearly sunspot numbers as reported by Wolf... | Download Scientific Diagram
Sunspot data from 2004 to the 2017 from database of the Royal... | Download Scientific Diagram
Solar Cycle 24 Status and Solar Cycle 25 Upcoming Forecast | NOAA / NWS Space Weather Prediction Center
Investigating the Properties of the Sun | 1 of 10 | Earth and Space Science | Practice | Albert
File:Sunspot Numbers-fr.svg - Wikimedia Commons
The Sunspot Number clarified | STCE
Sunspots and Climate | Center for Science Education
Sunspot data (NEW IMPROVED VERSION uses dlmread)
Corrected sunspot history suggests climate change not due to natural solar trends – Astronomy Now
The sun is still in a funk: sunspot numbers are dropping when they should be rising – Watts Up With That?
Monthly and smoothed sunspot number | SILSO
Online Rec. P.533-14 Propagation Prediction
NASA/Marshall Solar Physics
File:Changes in total solar irradiance and monthly sunspot numbers, 1975-2013-da.png - Wikimedia Commons
NASA/Marshall Solar Physics
Sun spot numbers dramatically decline during a grand solar minimum
Wolf number - Wikipedia
NASA/Marshall Solar Physics
SpaceWeather.com: The Sunspot Number
Sunspot Cycles, Butterfly Diagrams, Plasma Conveyor Belts
Figure 1 | Overlapping Magnetic Activity Cycles and the Sunspot Number: Forecasting Sunspot Cycle 25 Amplitude | SpringerLink
