Listen to radar echoes from satellites and meteors, live on listener-supported Space Weather Radio. |
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AURORA
ALERT: A geomagnetic storm is in
progress as Earth's magnetic field continues
to reverberate from a CME strike on July 14th. Sky
watchers in Scandinavia, Canada, Alaska and northern-tier
US states from Maine to Washington should be alert
for auroras after nightfall. Observing tip:
The hours around local midnight are usually best
for aurora-spotting. Aurora
alerts: text,
voice.
When the CME first arrived on July
14th, its effect appeared weak. However, conditions
in the wake of the CME have since become stormy.
On July 14-15 Northern Lights appeared in the United
States as far south as California, Colorado,
Missouri,
Utah,
Wisconsin,
Iowa,
Minnesota,
Washington,
Illinois,
Kansas,
Nebraska,
Michigan
and Arkansas.
Brad Goldpaint sends this picture of the auroras
reflecting from Sparks Lake in central Oregon:
Meanwhile in the southern hemisphere,
the aurora australis has been sighted in New
Zealand, Australia, and directly above the South
Pole itself. Visit our aurora gallery for a
complete set of images:
Realtime
Aurora Photo Gallery
Realtime
Space Weather Photo Gallery
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 15, 2012 there were
potentially hazardous asteroids.
Recent
& Upcoming Earth-asteroid encounters:
| Asteroid |
Date(UT) |
Miss
Distance |
Mag. |
Size |
| 2003 KU2 |
Jul 15 |
40.2 LD |
-- |
1.3 km |
| 2004 EW9 |
Jul 16 |
46.8 LD |
-- |
2.1 km |
| 2002 AM31 |
Jul 22 |
13.7 LD |
-- |
1.0 km |
| 37655 Illapa |
Aug 12 |
37 LD |
-- |
1.2 km |
| 2000 ET70 |
Aug 21 |
58.5 LD |
-- |
1.1 km |
| 1998 TU3 |
Aug 25 |
49.2 LD |
-- |
4.9 km |
| 2009 AV |
Aug 26 |
62.8 LD |
-- |
1.1 km |
| 1998 UO1 |
Oct 4 |
60.1 LD |
-- |
2.1 km |
| 2005 GQ21 |
Oct 12 |
77 LD |
-- |
1.0 km |
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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