sunspot

SID Database

About the SID Database

The Sudden Ionospheric Disturbance (SID) Database lists all events identified in the AAVSO Solar Bulletin. These results are provided monthly by the worldwide network of SID observers in the AAVSO Solar Division. Individual results are correlated with other observers' reports and reduced to a list of events with high definiteness ratings.

Solar Observing Guide in German

Thanks to an excellent volunteer effort by Ilka Petermann, the AAVSO's Solar Observing Guide is now available in German.

Click here to get to download (free-of-charge)

If you would like to translate the Guide into your native language, please contact Sara at AAVSO HQ. In addition to this new German version, we also have a French translation and Italian and Spanish versions are in progress.

Introducing... The AAVSO Solar Observing Guide

Thanks to a lot of hard work on the part of long-time sunspot observer Frank Dempsey and his team, the AAVSO is proud to announce the publication of a brand new observing manual designed to help introduce observers to the art and science of solar observing.

The AAVSO Solar Observing Guide

Click the link above to read more and download your copy - free of charge.