Policy changes in California, the nation’s biggest residential solar market by far, have a lot to do with both the contraction of the rooftop solar market and the rising popularity of home batteries. In April of last year, changes to the Golden State’s net-metering program took effect, slashing the rate at which rooftop solar owners could sell surplus power to the grid but boosting the value of batteries, which enable homeowners to save their solar power for the times when it’s most valuab...
The chart on this page shows the sunspot numbers since 1749. That's when the extensive recording of solar sunspot activity began. You can zoom in o...
The variable solar cycle of activity is a long-standing problem in physics. It modulates the overall level of space weather activity at earth, which in turn can have significant societal...
The observed and predicted Solar Cycle is depicted in Sunspot Number in the top graph and F10.7cm Radio Flux in the bottom graph. An updated version of the Solar Cycle prediction product is now available on NOAA's Space Weather Prediction Testbed. In both plots, the black line represents the monthly averaged data and the purple line represents a 13-month weighted, smoothed version of the monthly averaged data. The slider bars below each plot provide the ability to display the sunspot data back t...
These charts on this page resemble the progress of the solar cycle. The charts are updated every month by the SWPC with the latest ISES predictions...
Charting the solar cycle S. C. Chapman 1,2 * 1 Centre for Fusion, Space and Astrophysics... This provides a cycle-by-cycle chart which can be used to integrate heterogeneous information. On...
So far this year, 29 percent more solar has been installed than was at this point last year, per Ember. By the end of 2024, Ember says the world will be on track to reach 593 gigawatts of solar installations — 200 GW more than the International Energy Agency (IEA) predicted at the start of the year. That’s a significant underestimate: Those extra gigawatts alone represent more solar than the entire world built in 2021. This year’s record-breaking solar installations follow another peak year in 2023, when installations grew by 86 percent o ...
The Sun is growing increasingly active. Scientists now forecast that it may reach the peak of its current solar cycle—called the "solar maximum"—as soon as 2024. Here is the latest Solar Cycle 25 p...
We're familiar with the idea of the solar cycle, e.g.: 'The solar cycle or solar magnetic activity cycle is the nearly periodic 11-year change in the Sun's activity (including changes in the levels...
Last major update issued on September 6, 2017 at 05:00 UT. Update posted at 13:50 UT · The generally accepted way to portray Sunspots is using a smoothed count from Sunspot Index and Long-term Solar Observations (SILSO). SILSO data is provided by the Royal Observatory of Belgium, in Brussels. That number is charted below as Ri smoothed. ” Smoothed” is the process of averaging the daily numbers over some period of time. Silso number uses a formula* (see below) that incorporates some 13 mont...