, but this code // executes before the first paint, when is not yet present. The // classes are added to so styling immediately reflects the current // toolbar state. The classes are removed after the toolbar completes // initialization. const classesToAdd = ['toolbar-loading', 'toolbar-anti-flicker']; if (toolbarState) { const { orientation, hasActiveTab, isFixed, activeTray, activeTabId, isOriented, userButtonMinWidth } = toolbarState; classesToAdd.push( orientation ? `toolbar-` + orientation + `` : 'toolbar-horizontal', ); if (hasActiveTab !== false) { classesToAdd.push('toolbar-tray-open'); } if (isFixed) { classesToAdd.push('toolbar-fixed'); } if (isOriented) { classesToAdd.push('toolbar-oriented'); } if (activeTray) { // These styles are added so the active tab/tray styles are present // immediately instead of "flickering" on as the toolbar initializes. In // instances where a tray is lazy loaded, these styles facilitate the // lazy loaded tray appearing gracefully and without reflow. const styleContent = ` .toolbar-loading #` + activeTabId + ` { background-image: linear-gradient(rgba(255, 255, 255, 0.25) 20%, transparent 200%); } .toolbar-loading #` + activeTabId + `-tray { display: block; box-shadow: -1px 0 5px 2px rgb(0 0 0 / 33%); border-right: 1px solid #aaa; background-color: #f5f5f5; z-index: 0; } .toolbar-loading.toolbar-vertical.toolbar-tray-open #` + activeTabId + `-tray { width: 15rem; height: 100vh; } .toolbar-loading.toolbar-horizontal :not(#` + activeTray + `) > .toolbar-lining {opacity: 0}`; const style = document.createElement('style'); style.textContent = styleContent; style.setAttribute('data-toolbar-anti-flicker-loading', true); document.querySelector('head').appendChild(style); if (userButtonMinWidth) { const userButtonStyle = document.createElement('style'); userButtonStyle.textContent = `#toolbar-item-user {min-width: ` + userButtonMinWidth +`px;}` document.querySelector('head').appendChild(userButtonStyle); } } } document.querySelector('html').classList.add(...classesToAdd); })(); Solar Activity | NESDIS

Image of the earth with the sun in the background

The National Environmental Satellite, Data, and Information Service (NESDIS) continuously monitors the conditions on the Sun and in the space environment around the Earth, using measurements collected by instruments on satellites operated by NESDIS and partners like NASA as well as ground-based instruments operated by USAF, USGS, and international partners.

The term “space weather” generally refers to conditions resulting from solar activity that can potentially affect Earth, our atmosphere, and the near-Earth space environment.

For the latest solar activity outlooks, forecasts, and Alerts, Watches and Warnings, please go to the National Weather Service Space Weather Prediction Center (SWPC).

Common Types

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Sunspots and the Solar Cycle

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A telescopic image of the Sun zoomed to fill the screen. Colored a false green to identify the image as taken at a wavelength of 94 Angstroms to show 6 million degree plasma from the solar corona. Mottled with bright spots and dark regions, a bright spot just right of center stands out. This spot is the location of a solar flare which heats coronal plasma to millions of degrees revealing the magnetic field loops responsible for the solar flare.

Read about solar flares

Image of a solar flare on the sun

Solar Wind, Geomagnetic Storms, and Coronal Mass Ejections

Mass ejections and more

Observing the Sun

Six images show the sun in each of SUVI's six wavelengths.

SUVI Instrument On Board NOAA's GOES-16 Sends First Solar Images

More on SUVI

GOES SUVI 171 Angstrom

NOAA GOES East Satellite Captures Full Rotation of the Sun!

The Sun's Rotation

For the latest solar activity outlooks, forecasts, and Alerts, Watches and Warnings, please go to the National Weather Service Space Weather Prediction Center (SWPC).

Space Weather Prediction Center

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