Listen to radar echoes from satellites and meteors, live on listener-supported Space Weather Radio. |
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CHANCE
OF MAGNETIC STORMS: NOAA forecasters
estimate a 30% chance of polar geomagnetic storms
during the next 48 hours as a pair of CMEs pass
by Earth, possibly delivering glancing blows to
our magnetic field. Magnetic
storm alerts: text,
voice.
SHAPE-SHIFTING
SUNSPOT: As it pops and crackles
with low level solar flares, sunspot AR1504 is rapidly
evolving. During the past 24 hours the active region
has shape-shifted from an irregular dumbbell into
a dark ring of magnetism wide enough to circumscribe
a half-dozen planet Earths:
NOAA forecasters estimate a 55% chance
of M-class
solar flares today as the sunspot's magnetic field
shifts and destabilizes. Eruptions later this week
could be geoeffective as the sunspot turns to face
Earth. Stay tuned. Solar
flare alerts: text,
voice.
TRIPLE
FLYBY: As the solstice approaches
on June 20th, the International Space Station is
spending some extra time in the sun. Ironically,
this means you're more likely to see it in the night
sky. Mark Humpage photographed three ISS flybys
over his home in Lutterworth UK on June 10th:
"There were actually four flybys
this evening at 2207, 2343, 0119 and 0256 hrs, however,
the first was clouded out," says Humpage. "I
added a few bursts of flash just before the first
flyby to light up the garden and then left the camera
running all night. The following morning I extracted
all the images and stacked them to produce the final
composite."
Readers, now is a great time to look
for the behemoth spacecraft glistening in sunlight
among the stars. Flyby times are available on
your smartphone or from Space Weather's Simple
Satellite Tracker.
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
June 11, 2012 there were 1311
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.
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The
official U.S. government space weather bureau |
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The
first place to look for information about sundogs,
pillars, rainbows and related phenomena. |
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Researchers
call it a "Hubble for the sun." SDO
is the most advanced solar observatory ever. |
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3D
views of the sun from NASA's Solar and Terrestrial
Relations Observatory |
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Realtime
and archival images of the Sun from SOHO. |
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from
the NOAA Space Environment Center |
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the
underlying science of space weather |
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