Science news and information about the Sun-Earth environment.


Solar Wind

velocity: 277.4 km/s
0.8 protons/cm3
More about these data
Updated: Today at 2241 UT

Note: ACE solar wind data, reported above, remain unreliable as the ongoing radiation storm persists. An alternate source of data is the SOHO Proton Monitor.

Meteor Rates (24 hr max.)
visual: 5 per hr
(89 MHz): 25 per hr
More about these data
Updated: 10 Nov 2000

Sunspot Number: 149
More about sunspots
Updated: 09 Nov 2000

Daily Sun:10 Nov '00
The sun is littered with spots, but none have magnetic fields more complex than beta-class. Forecasters estimate a 50% chance of M-class solar flares.

Coronal Holes:

Our planet could enter a high speed solar wind stream from this coronal hole by Sunday, Nov. 12. Image credit: Yohkoh soft X-ray telescope.
More about coronal holes


Solar Flares: Probabilities for a medium-sized (M-class) or a major (X-class) solar flare during the next 24/48 hours are tabulated below.
Updated at 2000 Nov 09 2210 UT

FLARE 24 hr 48 hr
CLASS M 50 % 45 %
CLASS X 10 % 10 %

Geomagnetic Storms: Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at 2000 Nov 09 2210 UT

24 hr 48 hr
ACTIVE 30 % 20 %
MINOR 10 % 40 %
SEVERE 05 % 25 %

High latitudes
24 hr 48 hr
ACTIVE 30 % 20 %
MINOR 15 % 25 %
SEVERE 05 % 40 %

What's Up in Space -- 10 Nov 2000
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IMPACT! The coronal mass ejection from a powerful solar eruption on Nov. 8th hit Earth's magnetosphere Friday morning only 31 hours after leaving the Sun. Its earlier-than-expected arrival at 1:00 am EST sparked a G3-class geomagnetic storm that is still ongoing.

ONGOING RADIATION STORM: The flux of high-energy protons near Earth was ~100,000 times greater than normal on Thursday following a powerful solar flare at 2330 GMT (6:30 pm EST) on Nov. 8th. Since then the radiation density around our planet has declined by a factor of 10 and continues to lessen.

The coronal mass ejection (CME) that hit our magnetosphere today left the Sun on Nov 8th traveling 2035 km/s (4.5 million mph). It was propelled by the same eruption that sparked the ongoing radiation storm. The CME is barely visible through the snow-like haze of this SOHO coronagraph animation, captured Wednesday. The many specks and streaks are energetic particles striking the spacecraft's CCD camera.

RECENT AURORA: Updated Nov. 10 Geomagnetic storms on Nov. 3rd and Nov. 6th triggered widespread Northern Lights.

FAST MOVING ASTEROID: On Nov. 7, 2000, a 250-meter wide asteroid named 2000 UG11 zipped past our planet just 6.1 times farther away than the Moon. A series of movies shows how the apparent speed of the asteroid rapidly increased in the early days of November and then peaked at 29 degrees per day as the space rock made its closest approach to Earth. Amateur astronomers with 8 inch or larger telescopes can still spot 2000 UG11 for themselves as it slowly fades this week. [ephemeris for observers]

METEOR OUTLOOK: The early-November Taurids take center stage this week as the phase of the Moon becomes full. November's main event, the Leonids, are just around the corner. [details] Updated Nov. 3, 2000


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Nov. 7, 2000: Much Ado about 2000 SG344 -- In 2071 a relic of NASA's earliest space exploration efforts might return to Earth, if current estimates are confirmed.

Oct. 26, 2000: Lunar Leonids -- On Nov. 17, 2000, the moon will plow through a stream of debris from comet Tempel-Tuttle.

Oct. 10, 2000: The Moonlit Leonids 2000 -- Our planet is heading for a minefield of cosmic dust streams laid down by periodic comet Tempel-Tuttle. The result could be a series of meteor outbursts on Nov. 17 and 18, 2000.

Sept. 28, 2000: Bright Planets and Random Meteors -- This week's new Moon sets a dark stage for a sporadic meteor show featuring a cast of eye-catching stars and planets.

Sept. 20, 2000: A Good Month for Asteroids -- Five Near-Earth Asteroids flew past our planet during the month of September.

Sept. 13, 2000: A Surprising Coronal Mass Ejection -- A solar filament collapsed and fell to the surface of the Sun, spawning a coronal mass ejection that forecasters didn't expect.

Sept. 5, 2000: Sunbathing at Solar Max -- NASA scientists say that solar maximum is now in full swing. Does that mean you're more likely to suffer a sunburn at the beach? This story reveals the answer.

Sept. 1, 2000: A Close Encounter with a Space Rock -- A half-kilometer wide asteroid zooms past Earth barely 12 times farther from our planet than the Moon.

Aug. 14, 2000: The Extraordinary Geomagnetic Perseid Meteor Shower -- A coronal mass ejection hit Earth's magnetosphere just before the peak of the 2000 Perseid meteor shower.

Aug. 8, 2000: Perseid Dawn -- Stargazers could spot as many as 100 Perseid meteors per hour before dawn on August 12.


Editor's Note: Space weather forecasts that appear on this site are based in part on data from NASA and NOAA satellites and ground-monitoring stations. These predictions are not necessarily sanctioned by either organization.

Essential Web Links

NOAA Space Environment Center -- The official U.S. government bureau for real-time monitoring of solar and geophysical events, research in solar-terrestrial physics, and forecasting solar and geophysical disturbances.

Solar and Heliospheric Observatory -- Realtime and archival images of the Sun from SOHO.

Daily Sunspot Summaries -- from the NOAA Space Environment Center.

Current Solar Images --a gallery of up-to-date solar pictures from the National Solar Data Analysis Center at the Goddard Space Flight Center.

The Latest Space Weather Values -- from the NOAA Space Environment Center.

List of Potentially Hazardous Asteroids -- from the Harvard Minor Planet Center

Real-time Solar Wind Data -- from NASA's ACE spacecraft.

More Real-time Solar Wind Data -- from the Solar and Heliospheric Observatory Proton Monitor.

Aurora Forecast --from the University of Alaska's Geophysical Institute

USGS Magnetic Observatories -- near real-time geomagnetic data from the US Geological Survey.

Daily Solar Flare and Sunspot Data -- from the NOAA Space Environment Center.

Quarterly Solar Flare and Sunspot Data: January - March 2000 -- from the NOAA Space Environment Center.

Quarterly Solar Flare and Sunspot Data: April - June 2000 -- from the NOAA Space Environment Center.

Quarterly Solar Flare and Sunspot Data: July - Sept 2000 -- from the NOAA Space Environment Center.

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