Space weather - page 48


Sundiving comet and coronal mass ejection

A comet dove into the sun on May 11th and seemed to trigger a massive eruption. Watch the movie, then scroll down for further discussion. A comet goes in; a CME comes out. Coincidence? Probably, yes, the sequence was coincidental. The comet disintegrated

May 12, 2011


Comet hit the Sun?

A comet just discovered by amateur astronomer Sergey Shurpakov is diving past the sun today, and it will probably not survive. Click here to view a movie of the death plunge recorded by the Solar and Heliospheric Observatory--and check back for updates in the hours

May 11, 2011


Spectacular CME, active region approaching Earth

A sunspot located just behind the sun's eastern limb erupted during the waning hours of May 9th, hurling a spectacular coronal mass ejection into space: movie. NASA's Solar Dynamics Observatory photographed hot magnetic loops towering over the edge of the sun in the

May 11, 2011

J. Dana Hrubes red aurora hrubes 4sl_1304267087_med

Subsiding geomagnetic storm (May 04, 2012)

Earth is exiting a solar wind stream that has been stirring up geomagnetic storms around Earth's poles since April 29th. Over the past few nights, observers have seen auroras over the South Pole, Germany, Wisconsin andMichigan. The chances for more auroras are

May 04, 2011


Geomagnetic storm in progress

The geomagnetic field was unsettled to active at mid latitudes. Minor to major storm conditions occurred at high latitudes due to Coronal Hole (CH) high-speed stream (HSS) effects. Solar winds speeds were sustained above 620 km/s during the period. The greater than 2

May 02, 2011

Olivier Du Tre Aurora 2011 April 29 1_1304195537

Wonderful weekend auroras for start of May

It has been a good weekend for northern sky watchers. A solar wind stream hit Earth's magnetic field on Saturday, sparking two days of auroras around the Arctic Circle. In Alberta, Canada, this morning, the month of May began with a psychedelic sky:High-latitude

May 01, 2011


Geomagnetic storm in progress (April 30, 2012)

A solar wind stream hit Earth's magnetic field during the early hours of April 30th, sparking a high-latitude geomagnetic storm (slowly subsiding). In the United States, auroras descended as far south as Marquette, Michigan, where Shawn Malone took this picture before

April 30, 2011


Solar winds blowing earthward from Sun's new coronal hole

NASA's Solar Dynamics Observatory is monitoring a hole in the sun's atmosphere - a "coronal hole." It is the dark region circled in this extreme ultraviolet image taken during the early hours of April 28th: Coronal holes are places where the sun's magnetic field

April 28, 2011


Fast growing sunspot 1199

New sunspot 1199 is growing rapidly in the sun's northern hemisphere, ballooning in area by more than a factor of five during the last 24 hours. If the expansion continues apace, this active region could soon pose a threat for flares. Stay tuned. (SpaceWeather)

April 27, 2011


Big sunspot 1195 harbors energy for M-class solar flares

This detailed image of sunspot 1195 looks like it was taken by one of NASA's most advanced space telescopes. In fact, it comes from someone's backyard in the Netherlands. Scroll down for the full story, and carefully examine the starscape as you

April 24, 2011


Amazing B-class solar flare

B-class eruptions are weak and generally not considered spectacular, but the one recorded by NASA's Solar Dynamics Observatory (SDO) on April 23rd was quite different:The blast hurled hundreds of thousands of tons of plasma above the stellar surface with a powe

April 24, 2011


February solar flare was sparked by five spinning sunspots

The giant solar flare unleashed in February was caused by five rotating sunspots working in concert, the UK's National Astronomy Meeting has heard.Images released from the Solar Dynamics Observatory (SDO) clearly show the sunspots, which are centres of magnetic

April 21, 2011


Geomagnetic storm in progress (April 20, 2011)

Geomagnetic storm is in progress. K index showing level 5. Solar windspeed: 548.7 km/secdensity: 1.9 protons/cm3Planetary K-indexNow: Kp= 5 storm24-hr max: Kp= 5 stormThe K-index is a code that is related to the maximum fluctuations of horizontal

April 20, 2011

090123 stereo sun 02

Heating up of solar storms season

Sun woke up after three years of sleep. Several powerful solar flares occurred in recent months, with a February 14 blast as the strongest and  the most powerful outburst in more than four years. Considering surface of Sun dotted with sunspots and recent activity,

April 17, 2011


Eruption of magnetic canopy of sunspot 1190

The magnetic canopy of sunspot 1190 erupted on April 15th, producing an M-class solar flare (SDO movie). The brief blast did not, however, hurl a cloud of plasma toward Earth. NOAA forecasters estimate a 55% chance of more M-flares during the next 24 hours.

April 16, 2011

Warren Gammel IMG_8464_1302619207_med

Subsiding geomagnetic storm (April 13,2011)

A geomagnetic storm that sparked auroras around the Arctic Circle and sent Northern Lights spilling over the Canadian border into the United States on April 12th is subsiding. At the height of the display, Shawn Malone took this picture from the shores of Lake

April 13, 2011


Geomagnetic storm in progress (April 12, 2011)

  K-indices of 5 or greater indicate storm-level geomagnetic activity around earth.Geomagnetic Storms: Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm. The

April 12, 2011