Satellite News » SOLAR ACTIVITY

STEREO observed CME that turned satellite into zombie

Thu, 08 Jul 2010 15:58:00 +0000

Observations from NASA’s twin Solar Terrestrial Relations Observatory (STEREO) spacecraft have allowed U.S. Naval Research Laboratory scientists to see recent solar activity that may have produced the first casualty of the new solar cycle #24. A coronal mass ejection from 3 April 2010 apparently resulted in a critical failure on the Galaxy 15 communications satellite (a.k.a. Zombiesat).
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NOAA: Mild Solar Storm Season Predicted

Fri, 08 May 2009 22:56:00 +0000

Although its peak is still four years away, a new active period of Earth-threatening solar storms will be the weakest since 1928, predicts an international panel of experts led by NOAA’s Space Weather Prediction Center and funded by NASA. Despite the prediction, Earth is still vulnerable to a severe solar storm.

NASA-funded study reveals hazards of severe space weather

Mon, 05 Jan 2009 22:57:00 +0000

A NASA-funded study describes how extreme solar eruptions could have severe consequences for communications, power grids and other technology on Earth.

NASA’S SDO to improve predictions of violent space weather

Mon, 03 Mar 2008 23:00:05 +0000

Sometime between the end of 2008 and the beginning 2009, NASA will launch the Solar Dynamics Observatory (SDO) to examine how the Sun builds up and explosively releases magnetic energy, which powers severe space weather.

Flares from far side of the Sun affect space weather

Fri, 24 Aug 2007 20:51:39 +0000

Observations of solar flares by spacecraft at Mars, Venus and the Earth show that eruptions on the far side of the Sun may affect space weather back on Earth.

Scientists one step closer to understanding killer electrons

Tue, 10 Jul 2007 22:09:17 +0000

Settling a longstanding scientific debate, Los Alamos scientists have demonstrated conclusively how electromagnetic waves accelerate ordinary electrons in the belts of radiation outside Earth’s atmosphere to a state where they become “killer electrons,” particles that are hazardous to satellites, spacecraft, and astronauts.
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Electrons help forecast extreme solar events

Mon, 28 May 2007 21:54:23 +0000

Research by Dr. Arik Posner, a research scientist at Southwest Research Institute (SwRI), has led to a new method for forecasting the appearance and intensity of solar ion events by measuring relativistic, near light-speed electrons.

Radio signals help forecast radiation storms

Mon, 28 May 2007 21:54:23 +0000

Coronal Mass Ejection (CMEs) with powerful shocks capable of causing radiation storms “scream” in radio waves as they slam through the solar wind, according to Dr. Natchimuthuk Gopalswamy of NASA’s Goddard Space Flight Center.

Next solar storm cycle will start late

Thu, 26 Apr 2007 21:44:10 +0000

The next 11-year cycle of solar storms will most likely start next March and peak in late 2011 or mid-2012 — up to a year later than expected — according to a forecast issued by the U.S. National Oceanic and Atmospheric Administration’s Space Environment Center in coordination with an international panel of solar experts.

STEREO spacecraft make first 3-D images of Sun

Tue, 24 Apr 2007 22:48:34 +0000

NASA’s twin Solar Terrestrial Relations Observatory (STEREO) spacecraft have made the first three-dimensional images of the sun. The new view will greatly aid scientists’ ability to understand solar physics and thereby improve space weather forecasting, the agency said.