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Space Weather Bureau

SpaceWeather.com
Science news and information about the Sun-Earth environment.

SPACE WEATHER
Current
Conditions

Solar Wind

velocity: 447.7 km/s
density:
6.3 protons/cm3
explanation | more data
Updated: Today at 2156 UT

X-ray Solar Flares

6-hr max:
C2 1845 UT Mar19
24-hr: C2 1845 UT Mar19
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 19 Mar '01
The already-low sunspot number is set to plunge even lower when 9373 and 9384 disappear over the Sun's western limb. Sunspot group 9373 has a beta-gamma magnetic field that may harbor energy for M-class solar flares.

Sunspot Number: 91
More about sunspots
Updated: 18 Mar 2001

Radio Meteor Rate
24 hr max:
28 per hr
Listen to the Meteor Radar!
Updated: 16 Mar 2001

Interplanetary Mag. Field
Btotal: 14.8 nT
Bz:
4.3 nT north
explanation | more data
Updated: Today at 2158 UT

Coronal Holes:

A tiny coronal hole crossing the center of the Sun's disk is spewing a solar wind stream that Earth may encounter later this week. 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 Mar 19 2200 UT

FLARE 24 hr 48 hr
CLASS M 25 % 25 %
CLASS X 01 % 01 %

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 Mar 19 2200 UT

Mid-latitudes
24 hr 48 hr
ACTIVE 20 % 10 %
MINOR 05 % 05 %
SEVERE 01 % 01 %

High latitudes
24 hr 48 hr
ACTIVE 25 % 15 %
MINOR 10 % 05 %
SEVERE 05 % 01 %


What's Up in Space -- 19 Mar 2001
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HERE COMES THE SUN: Coronagraphs on board the ESA-NASA Solar and Heliospheric Observatory spotted two halo coronal mass ejections (CMEs) during the weekend. The first emerged at 02:06 UT on 2001/03/18 -- this was a backside event and not directed toward Earth. A second, much fainter CME appeared at 05:26 UT on 2001/03/19 after a solar filament collapsed. This second CME is Earth-directed and should arrive in our vicinity on March 22nd. Stay tuned for additional details.

IMPACT! An interplanetary shock wave buffeted Earth's magnetosphere Monday morning at 1100 UT. The disturbance was the leading edge of a coronal mass ejection that left the Sun on March 15th. A G1-category geomagnetic storm is in progress. [450 kb CME animation]

MIR UPDATE: On March 19, 2001, the Russian Space Agency reports that space station Mir is 228 km above Earth and losing altitude at a rate of 3 km per day. Deorbiting maneuvers are expected to begin on March 22nd when Mir's altitude is 220 km. [Full Story]

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



Potentially Hazardous Asteroids (PHAs) are space rocks larger than ~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 searching for and discovering new ones all the time.

On 19 Mar 2001 there were 291 known Potentially
Hazardous Asteroids

Upcoming Encounters with Earth (Mar 1 - Apr 30)

Object

 Date (UTC)

 Miss Distance
2000 PN9  2001-Mar-02 17:29

 0.0610 AU
1998 SF36  2001-Mar-29 18:37

 0.0383 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

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.

SpaceWeather.com is sponsored in part by the American Red Cross.
 

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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