|   SPACE WEATHER
Current
Conditions
Solar Wind
velocity: 397.3 km/s
density:2.7 protons/cm3
explanation | more data
Updated: Today at 2248 UT
X-ray Solar Flares
6-hr max: B7 1800 UT Apr19
24-hr: M1 1135 UT Apr19
explanation | more data
Updated: Today at 2250 UT
Daily Sun: 19 Apr '01 
Sunspot 9393, once the largest sunspot of the current solar cycle, is peeking over the Sun's east limb after spending two weeks crossing the back side of the Sun. The returning spot is also known as 9433.
Sunspot Number: 63
More about sunspots
Updated: 18 Apr 2001
Radio Meteor Rate
24 hr max: 40 per hr
Listen to the Meteor Radar!
Updated: 19 Apr 2001 Interplanetary Mag. Field
Btotal: 4.8 nT
Bz: 0.7 nT north
explanation | more data
Updated: Today at 2248 UT Coronal Holes:
None of the coronal holes revealed in this ultraviolet image of the Sun are well-situated to send solar wind streams toward Earth. Image credit: SOHO Extreme Ultraviolet 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 19 2200 UT
| FLARE | 24 hr | 48 hr | | CLASS M | 50 % | 50 % | | CLASS X | 05 % | 05 % |
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 19 2200 UT Mid-latitudes | 24 hr | 48 hr | | ACTIVE | 10 % | 10 % | | MINOR | 05 % | 05 % | | SEVERE | 01 % | 01 % |
High latitudes | 24 hr | 48 hr | | ACTIVE | 15 % | 15 % | | MINOR | 10 % | 10 % | | SEVERE | 01 % | 01 % |
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| What's Up in Space -- 19 Apr 2001
Subscribe to Space Weather News!  IT'S BACK: Giant sunspot 9393 -- the source of the biggest solar flare ever recorded and several geomagnetic storms earlier this month-- disappeared two weeks ago when it rotated around the Sun's western limb. Now, after two weeks crossing the back side of our star, 9393 is back. At its peak on March 28th the active region covered an area equal to fourteen planet Earths. How big is it now? We'll find out as it rotates into direct view during the days ahead.
Above: This SOHO white light image of the Sun reveals sunspot 9393 returning over the Sun's eastern limb.  NEW AURORA IMAGES: As night fell across North America on Tuesday an interplanetary shock wave swept past Earth and triggered a strong G3-category geomagnetic storm. Sky watchers across Canada and in many US states spotted bright Northern Lights. If you missed the storm, don't worry, you can still visit our April 18th 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 19 Apr 2001 there were 304 known Potentially
Hazardous Asteroids April 2001 Earth-asteroid encounters | Object | Date (UTC) | Miss Distance | | 2001 GT2 | 2001-Apr-01 00:09 | 0.0454 AU | | 2001 HB | 2001-Apr-02 04:21 | 0.0323 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 | | 2001 GR2 | 2001-Apr-18 04:07 | 0.0761 AU | | 2001 GQ2 | 2001-Apr-27 12:00 | 0.0199 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 |
