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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids

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Science news and information about the Sun-Earth environment.

SPACE WEATHER
Current
Conditions

Solar Wind

velocity: 552.8 km/s
density:
3.1 protons/cm3
explanation | more data
Updated: Today at 2247 UT

X-ray Solar Flares

6-hr max:
M5 1725 UT Apr05
24-hr: M8 0920 UT Apr05
explanation | more data
Updated: Today at 2250 UT

Daily Sun: 05 Apr '01
The giant sunspot 9393 has vanished over the Sun's western limb, but a new large sunspot (9415) has emerged to take its place as a potential source of solar activity. AR9415 unleashed an X1-class flare on April 3rd.

Sunspot Number: 217
More about sunspots
Updated: 04 Apr 2001

Radio Meteor Rate
24 hr max:
35 per hr
Listen to the Meteor Radar!
Updated: 05 Apr 2001

Interplanetary Mag. Field
Btotal: 6.6 nT
Bz:
3.1 nT north
explanation | more data
Updated: Today at 2247 UT

Coronal Holes:

A small coronal hole is growing east of the Sun's central meridian. The many speckles in this image are caused by energetic solar particles striking the camera -- the result of an ongoing radiation storm around Earth. Image credit: SOHO Extreme UV Telescope.
More about coronal holes


SPACE WEATHER
NOAA
Forecasts

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 2001 Apr 05 2200 UT

FLARE 24 hr 48 hr
CLASS M 75 % 75 %
CLASS X 20 % 20 %

Geomagnetic Storms: Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at 2001 Apr 05 2200 UT

Mid-latitudes
24 hr 48 hr
ACTIVE 30 % 25 %
MINOR 15 % 10 %
SEVERE 10 % 05 %

High latitudes
24 hr 48 hr
ACTIVE 30 % 25 %
MINOR 20 % 15 %
SEVERE 15 % 10 %



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What's Up in Space -- 5 Apr 2001
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IMPACT: Monday's super solar flare hurled a coronal mass ejection (CME) into space. At 1500 UT (11:00 am EST) on April 4th an interplanetary shock wave generated by the CME struck our planet's magnetosphere and triggered a minor geomagnetic storm. [550 kb CME movie]

SUPERFLARE: The most powerful solar flare in at least 25 years erupted near sunspot 9393 on April 2nd. The "X20" blast was even stronger than a well-known flare in March 1989 that led to the collapse of a power grid in Quebec. There were no such calamities this time because the explosion was mostly (but not entirely; see above) directed away from Earth. See also:

AURORAL WEEKEND: Last weekend a powerful geomagnetic storm spawned Northern Lights as far south as Mexico. The 24-hr storm began on March 31st when a coronal mass ejection (CME) from the giant sunspot 9393 struck Earth's magnetosphere. The leading edge of the CME was dense and strongly magnetized -- traits that give rise to intense auroras.


See the Weekend Aurora Gallery

WEB LINKS: NOAA FORECAST | GLOSSARY | SPACE WEATHER TUTORIAL | LESSON PLANS | BECOME A SUBSCRIBER



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 are on a collision course with our planet, although astronomers are finding new ones all the time. [more]

On 5 Apr 2001 there were 299 known Potentially
Hazardous Asteroids

ASTEROIDS GALORE: March was a good month for asteroid hunters. Between March 21st and 31st astronomers discovered seven Earth-approaching space rocks (click to view 3D orbits): 2001 FM129, 2001 FE90, 2001 FB90, 2001 FD58, 2001 FC58, 2001 FA58 and 2001 FO32. There is no danger of a collision with any of these asteroids.

Earth-asteroid encounters (Mar 1 - Apr 30)

Object

 Date (UTC)

 Miss Distance
2001 FC58  2001-Mar-18 20:38

 0.1173 AU
2001 EC16  2001-Mar-23 16:00

 0.0113 AU
2001 FO32  2001-Mar-28 19:47

 0.1670 AU
1998 SF36  2001-Mar-29 18:37

 0.0383 AU
2001 FA58  2001-Apr-02 07:56

 0.1128 AU
1986 PA  2001-Apr-03 01:06

 0.1465 AU
2000 EE104  2001-Apr-12 20:37

 0.0822 AU

  • TOTAL LUNAR ECLIPSE: On Jan. 9, 2001, the full Moon glided through Earth's copper-colored shadow. [gallery]
  • CHRISTMAS ECLIPSE: Sky watchers across North America enjoyed a partial solar eclipse on Christmas Day 2000 [gallery]
  • LEONIDS 2000: Observers around the globe enjoyed three predicted episodes of shooting stars. [gallery]

Feb. 21, 2001: Nature's Tiniest Space Junk -- Using an experimental radar at the Marshall Space Flight Center, scientists are monitoring tiny but hazardous meteoroids that swarm around our planet.

Feb. 15, 2001: The Sun Does a Flip -- NASA scientists who monitor the Sun say our star's enormous magnetic field is reversing -- a sure sign that solar maximum is here.

Jan. 25, 2001: Earth's Invisible Magnetic Tail -- NASA's IMAGE spacecraft, the first to enjoy a global view of the magnetosphere, spotted a curious plasma tail pointing from Earth toward the Sun.

Jan. 4, 2001: Earth at Perihelion -- On January 4, 2001, our planet made its annual closest approach to the Sun.

Dec. 29, 2000: Millennium Meteors -- North Americans will have a front-row seat for a brief but powerful meteor shower on January 3, 2001.

Dec. 28, 2000: Galileo Looks for Auroras on Ganymede -- NASA's durable Galileo spacecraft flew above the solar system's largest moon this morning in search of extraterrestrial "Northern Lights"

Dec. 22, 2000: Watching the Angry Sun -- Solar physicists are enjoying their best-ever look at a Solar Maximum thanks to NOAA and NASA satellites.

MORE SPACE WEATHER HEADLINES

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Caveat Emptor: Space weather forecasts that appear on this site are based in part on data from NASA and NOAA satellites and ground-monitoring stations. Predictions and explanations are formulated by Dr. Tony Phillips; they are not official statements of any government organ or guarantees of space weather activity.

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. (European Mirror Site)

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 SOHO Coronagraph Images -- from the Naval Research Lab

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

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

Observable Comets -- from the Harvard Minor Planet Center.

What is the Interplanetary Magnetic Field? -- A lucid answer from the University of Michigan.

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

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

Lists of Coronal Mass Ejections -- from 1998 to 2001.

NOAA geomagnetic latitude maps: North America, Eurasia, South Africa & Australia, South America

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.

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

 

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