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The 01 August 2010 event - Fully screened

On Aug 01, a series of solar events gave rise to a combination of Earth-directed halo CME's. We screen the event based on SDO and STEREO-Ahead movies, and ACE data.

What is peculiar is the fact that the accompagnied flare was only of a moderate class. It was a combination of different events in a fast sequence. In a way of speaking, all the energies involved in each process added to each other and resulted in a final energetic impact on Earth.

SWAP & LYRA data release - PROBA2 Guest Investigator Program

The ESA micro-satellite PROBA2 was launched last November with two solar instruments onboard: SWAP, an EUV imager, and LYRA, a UV radiometer. SWAP and LYRA have an open data policy. We are happy to announce the beta data release of the science data products.
We also announce the open call for the PROBA2 Guest Investigator Program to promote & fund SWAP and LYRA data analysis by external scientists (submission deadline June 10!).

For the time being, we have online the following FITS files in YYYY/MM/DD directories:

PROBA2 observes a solar eruption that touched Earth

On April 03, 2010, the SIDC sent out a PRESTO message alerting about the halo CME heading for Earth. PROBA2 witnesses the radiation flare associated with the plasma eruption.

PROBA2 on the cover of the ESA-portal

The best of ... 2009!

A compilation of the most memorable space weather moments of 2009 can be found underneath. Using the fantastic (J)Helioviewer software, a ***MOVIE*** was created containing one or more clips of each event. Usually, images obtained by SOHO and the STEREO spacecraft were used.

The fingerprint of the new solar cycle

This news item was written by F. Clette from the SIDC/WDC.

The Sun is not dead!

See this link for the English version.

Zie deze link voor de Nederlandstalige versie.

 

Where to find the International Sunspot Number?

The SIDC provides the International Sunspot Number (ISN) in different forms and on different time scales: estimated, provisional, definitive, daily, monthly, monthly smoothed, yearly, ASCII, graphs. The choice is up to you.

Solar radio silence ended

The godfather of the solar wind: E. Parker

We have the honor to welcome E. Parker in June 2009 at the Solar-Terrestrial Center of Excellence. This will be an occasion to speak to the world's top expert on the solar wind. It was in the 1950s that Parker developed his theory about the solar wind. In the perception of many, his name is a synonym for solar wind. Parker suggested that the corona, the exterior part of the solar atmosphere is continuously expanding. This spherically symmetric expansion is called the solar wind.

Top Ten of ... 2008!

A compilation of the most memorable space weather moments of 2008 can be found underneath. Using the fantastic (J)Helioviewer software, a ***MOVIE*** was created containing one or more clips of each event. Usually, images obtained by SOHO and the STEREO spacecraft were used.

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