Marianne's Heaven On Earth Aurora Chaser Tours Chasethelighttours.co.uk invites you to join them in their quest to find and photograph the Aurora Borealis. Experience the winter wonderland in the Tromsø Area.
| || |
THE SOLAR ECLIPSE IS ABOUT TO BEGIN: Later today, there's going to be a total eclipse of the sun. It begins at sunrise on March 9th over the islands of Indonesia. That's the afternoon of March 8th in the United States. Sky watchers inside the narrow path of totality, which cuts across the Pacific Ocean from Sumatra to the waters north of Hawaii, can feel the touch of the Moon's cool shadow and behold the sun's corona. Stay tuned to the realtime photo gallery for the first sightings.
DON'T FORGET THE PARTIAL ECLIPSE: Mainstream media attention is focused on today's total eclipse of the sun. Fair enough. Totality is a mesmerizing experience that turns ordinary people into lifelong eclipse chasers. But don't forget about the partial eclipse. As this animated map created by graphic artist Larry Koehn shows, the sun will be partially covered over almost half of the planet:
Unlike the path of totality, which is very narrow, the partial eclipse zone is huge. It touches places as far apart as Alaska (20% coverage), Hawaii (65%), Australia (0% to 60%), China (0% to 40%), Japan (20%), and Papua New Guinea (70%). This is good, because a partial eclipse is total fun.
The first thing to remember about a partial eclipse is don't stare at it. Even the tiniest sliver of sun left uncovered by the Moon can hurt your eyes. Instead, look at the ground. Beneath a leafy tree, you might be surprised to find hundreds of crescent-shaped sunbeams dappling the grass. Overlapping leaves create a natural array of pinhole cameras, each one casting an image of the crescent-sun onto the ground beneath the canopy.
No trees? Try this trick: Criss-cross your fingers waffle-style and let the sun shine through the matrix of holes. You can cast crescent suns on sidewalks, driveways, friends, cats and dogs—you name it. Hand shadows are fun, too, like the crescent-eyed turkey shown above.
Because the partial eclipse lasts for more than an hour, there is plenty of time for shadow play and photography using safely-filtered telescopes and cameras. The view from Hawaii and Alaska, where the eclipse occurs near sunset, should be especially beautiful.
Realtime Spaceweather Photo Gallery
MAGNETIC REVERBERATIONS: Here on Spaceweather.com, we often say that Earth's magnetic field is "reverberating" from the impact of a CME or a solar wind stream. This is what we mean:
This plot shows the response of a magnetometer in England to a strong geomagnetic storm on March 6th and 7th. The east-west vector of Earth's magnetic field was swinging back and forth, "reverberating" as a stream of solar wind passed by our planet.
"My magnetometer went wild on March 6th as Earth entered a fast flowing and highly geoeffective solar wind stream, creating bright aurora even down to lower latitudes over Europe," reports Stuart Green of Preston, Lancashire, UK. "This is the largest response I've measured so far this year."
Magnetic fields cannot be seen by the human eye, but the magnetic reverberations were anything but invisible. This is what the sky looked like overhead:
Colin Cooper took the picture from Tynemouth, UK, barely 150 miles away from Green's magnetometer. "An incredible display rarely seen this far south," says Cooper. "There were some of the brightest rays and fastest movement I've ever seen for auroras in the UK."
The display was also seen in Scandinavia, Iceland, Canada, several US states, and even in the Southern Hemisphere. Browse the gallery for more reverberations:
Realtime Aurora Photo Gallery
Realtime Spaceweather Photo Gallery
Realtime Comet 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 Mar. 8, 2016, the network reported 15 fireballs.
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 March 8, 2016 there were potentially hazardous asteroids.
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 |
These measurements are based on regular space weather balloon flights: learn more.
|Situation Report -- Oct. 30, 2015 ||Stratospheric Radiation (+37o N) |
|Cosmic ray levels are elevated (+6.1% above the Space Age median). The trend is flat. Cosmic ray levels have increased +0% in the past month. |
|Sept. 06: 4.14 uSv/hr (414 uRad/hr) |
|Sept. 12: 4.09 uSv/hr (409 uRad/hr) |
|Sept. 23: 4.12 uSv/hr (412 uRad/hr) |
|Sept. 25: 4.16 uSv/hr (416 uRad/hr) |
|Sept. 27: 4.13 uSv/hr (413 uRad/hr) |
|Oct. 11: 4.02 uSv/hr (402 uRad/hr) |
|Oct. 22: 4.11 uSv/hr (411 uRad/hr) |
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. Our measurements show that someone flying back and forth across the continental USA, just once, can absorb as much ionizing radiation as 2 to 5 dental X-rays. For example, here is the data from a flight on Oct. 22, 2015:
Radiation levels peak at the entrance to the stratosphere in a broad region called the "Pfotzer Maximum." This peak is named after physicist George Pfotzer who discovered it using balloons and Geiger tubes in the 1930s. Radiation levels there are more than 80x sea level.
Note that the bottom of the Pfotzer Maximim is near 55,000 ft. This means that some high-flying aircraft are not far from the zone of maximum radiation. Indeed, according to the Oct 22th measurements, a plane flying at 45,000 feet is exposed to 2.79 uSv/hr. At that rate, a passenger would absorb about one dental X-ray's worth of radiation in about 5 hours.
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 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." SDO is the most advanced solar observatory ever. |
| ||3D views of the sun from NASA's Solar and Terrestrial Relations Observatory |
| ||Realtime and archival images of the Sun from SOHO. |
| ||from the NOAA Space Environment Center |
| ||the underlying science of space weather |