| | Switch to: Europe, USA, New Zealand, Antarctica Credit: NOAA/Ovation Planetary K-index Now: Kp= 3 quiet 24-hr max: Kp= 3 quiet explanation | more data Interplanetary Mag. Field Btotal: 12.4 nT Bz: 6.3 nT north more data: ACE, DSCOVR Updated: Today at 2348 UT Coronal Holes: 01 Jul 17 Solar wind flowing from the indicated coronal hole could reach Earth on July 3rd. Credit: NASA/SDO. Noctilucent Clouds NASA's AIM spacecraft, which monitors NLCs from space, recent moved into a new orbit around Earth. Daily data are currently unavailable while the spacecraft's pointing settles. Polar images should resume in early June. Stay tuned! Switch view: Ross Ice Shelf, Antarctic Peninsula, East Antarctica, Polar Updated at: 02-24-2017 17:55:02 SPACE WEATHER NOAA Forecasts | | Updated at: 2017 Jul 01 2205 UTC FLARE | 0-24 hr | 24-48 hr | CLASS M | 01 % | 01 % | CLASS X | 01 % | 01 % | Geomagnetic Storms: Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm Updated at: 2017 Jul 01 2205 UTC Mid-latitudes | 0-24 hr | 24-48 hr | ACTIVE | 40 % | 35 % | MINOR | 25 % | 25 % | SEVERE | 05 % | 10 % | High latitudes | 0-24 hr | 24-48 hr | ACTIVE | 10 % | 15 % | MINOR | 25 % | 20 % | SEVERE | 65 % | 20 % | | | | | | | | | | | | Lights Over lapland is excited to announce that Autumn Aurora Adventures are available for immediate booking! Reserve your adventure of a lifetime in Abisko National Park, Sweden today! | | | EARLY CME IMPACT: Arriving almost 24 hours earlier than expected, a CME reached Earth on July 1st at approximately 1700 UT. The cloud's relatively weak impact has not yet sparked a geomagnetic storm. However, G1 storm conditions could develop in the hours ahead as Earth moves through the CME's turbulent wake. Stay tuned for updates. Free: Aurora Alerts NOCTILUCENT CLOUD ACTIVITY: Sky watchers in Europe are reporting bright displays of noctilucent clouds this weekend. "Strands of electric-blue started showing very early, just after midnight BST on July 1st," says Andy Stables, who sends this picture from Milovaig on Isle of Skye, Scotland: "They gradually grew brighter and more extensive as our twilight arc shifted into the north, reaching peak intensity around 2am," he says. This and other displays like it are telling us something about the weather in Earth's mesosphere: It's very cold up there. Noctilucent clouds form when summertime wisps of water vapor rise to the top of the atmosphere and wrap specks of meteor smoke with fragile crystals of ice. This process requires temperatures as low as 145 K (-128 C). In early June, an unexpected heat wave in the mesosphere temporarily wiped out noctilucent clouds. Their return proves that the heat wave is over. Realtime Noctilucent Cloud Photo Gallery THESE PENDANTS HAVE TOUCHED SPACE: Looking for a far-out gift? On April 15, 2017, the students of Earth to Sky Calculus flew a payload-full of heart-shaped Venus pendants to the stratosphere onboard a high-altitude helium balloon. Here's one floating 111,550 feet above the Sierras of central California: You can have one for $129.95. Each glittering pendant comes with a greeting card showing the jewelry in flight and telling the story of its journey to the stratosphere and back again. More items from the edge of space may be found in the Earth to Sky Store. All proceeds support atmospheric radiation monitoring and hands-on STEM education. Far Out Gifts: Earth to Sky Store All proceeds support hands-on STEM education NASA CREATES ARTIFICIAL 'SPACE CLOUDS': After multiple scrubbed launch attempts over the last 30 days, a Terrier-Improved Malemute sounding rocket finally blasted off from NASA's Wallops Flight Facility in Virginia at 4:25 a.m. on June 29th. The resulting display of "space clouds" was worth the wait: Christopher Becke captured this star-trailed image from Williamsburg, Virginia. "I was 82 miles from the launch site but had no trouble seeing the rocket or the clouds," he says. During the 8-minute flight, the rocket deployed 10 canisters about the size of soft drink cans more than 100 miles above Earth's surface. The canisters dispensed barium, strontium and cupric-oxide, which interacted to form blue-green and red vapors visible from New York to North Carolina. According to the space agency, the chemicals "pose[d] no hazard to residents along the mid-Atlantic coast." "As the canisters fired, the erupting colors were vivid and brilliantly apparent," reports onlooker Susan Milligan of Williamsburg VA. "The photos hardly do them justice." Such clouds allow scientists on the ground to visually track particle motions at the edge of space, giving them new insights into the dynamics of Earth's ionosphere. Realtime Space Weather Photo Gallery Realtime Aurora Photo Gallery Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA's Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth's atmosphere and many other characteristics. Daily results are presented here on Spaceweather.com. On Jul. 1, 2017, the network reported 17 fireballs. (16 sporadics, 1 Northern June Aquilid) In this diagram of the inner solar system, all of the fireball orbits intersect at a single point--Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). [Larger image] [movies] Potentially Hazardous Asteroids ( PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet, although astronomers are finding new ones all the time. On July 1, 2017 there were 1803 potentially hazardous asteroids. | Recent & Upcoming Earth-asteroid encounters: Asteroid | Date(UT) | Miss Distance | Velocity (km/s) | Diameter (m) | 2017 MA3 | 2017-Jun-27 | 3.2 LD | 9.3 | 16 | 2017 MB3 | 2017-Jun-30 | 5 LD | 6.4 | 31 | 2017 MC1 | 2017-Jun-30 | 2.5 LD | 11.6 | 44 | 2017 MC3 | 2017-Jul-02 | 6.5 LD | 13.2 | 56 | 2017 ME4 | 2017-Jul-03 | 5.4 LD | 6.8 | 20 | 2017 MB5 | 2017-Jul-05 | 18.9 LD | 9.5 | 114 | 2017 MQ7 | 2017-Jul-06 | 17.6 LD | 10.9 | 84 | 2017 MA5 | 2017-Jul-06 | 15 LD | 7.9 | 26 | 2017 MP7 | 2017-Jul-08 | 11 LD | 8.2 | 29 | 2017 MC4 | 2017-Jul-11 | 7.6 LD | 20.7 | 154 | 2007 MB4 | 2017-Jul-16 | 14.5 LD | 9.6 | 107 | 2017 BS5 | 2017-Jul-23 | 3.1 LD | 5.8 | 54 | 2014 OA339 | 2017-Aug-13 | 12.3 LD | 10 | 47 | Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach. | Cosmic Rays in the Atmosphere | Readers, thank you for your patience while we continue to develop this new section of Spaceweather.com. We've been working to streamline our data reduction, allowing us to post results from balloon flights much more rapidly, and we have developed a new data product, shown here: This plot displays radiation measurements not only in the stratosphere, but also at aviation altitudes. Dose rates are expessed as multiples of sea level. For instance, we see that boarding a plane that flies at 25,000 feet exposes passengers to dose rates ~10x higher than sea level. At 40,000 feet, the multiplier is closer to 50x. These measurements are made by our usual cosmic ray payload as it passes through aviation altitudes en route to the stratosphere over California. What is this all about? Approximately once a week, Spaceweather.com and the students of Earth to Sky Calculus fly space weather balloons to the stratosphere over California. These balloons are equipped with radiation sensors that detect cosmic rays, a surprisingly "down to Earth" form of space weather. Cosmic rays can seed clouds, trigger lightning, and penetrate commercial airplanes. Furthermore, there are studies ( #1, #2, #3, #4) linking cosmic rays with cardiac arrhythmias and sudden cardiac death in the general population. Our latest measurements show that cosmic rays are intensifying, with an increase of more than 13% since 2015: Why are cosmic rays intensifying? The main reason is the sun. Solar storm clouds such as coronal mass ejections (CMEs) sweep aside cosmic rays when they pass by Earth. During Solar Maximum, CMEs are abundant and cosmic rays are held at bay. Now, however, the solar cycle is swinging toward Solar Minimum, allowing cosmic rays to return. Another reason could be the weakening of Earth's magnetic field, which helps protect us from deep-space radiation. The radiation sensors onboard our helium balloons detect X-rays and gamma-rays in the energy range 10 keV to 20 MeV. These energies span the range of medical X-ray machines and airport security scanners. The data points in the graph above correspond to the peak of the Reneger-Pfotzer maximum, which lies about 67,000 feet above central California. When cosmic rays crash into Earth's atmosphere, they produce a spray of secondary particles that is most intense at the entrance to the stratosphere. Physicists Eric Reneger and Georg Pfotzer discovered the maximum using balloons in the 1930s and it is what we are measuring today. | The official U.S. government space weather bureau | | The first place to look for information about sundogs, pillars, rainbows and related phenomena. | | Researchers call it a "Hubble for the sun." 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