News and information about meteor showers, solar flares, auroras, and near-Earth asteroids. Realtime Image Gallery. Radiowave Propagation Center: forecast + current sunspot cycle activity, space weather, geomagnetic conditions. Com - Trend Charts. Solar Flares STEREO Web Site. Solar Terrestrial Activity Report. Last major update issued on April 11, 2014 at 05:25 UTC.
[Solar and geomagnetic data - last month (updated daily)] [Solar wind and electron fluence charts (updated daily)] [Solar cycles 23-24 (last update April 1, 2014)] [Cycle 24 progress (last update April 1, 2014) ] [Solar cycles 1-20] [Graphical comparison of cycles 21, 22, 23 and 24 (last update April 1, 2014)] [Graphical comparison of cycles 10, 12, 13, 14, 16 and 24 (last update April 1, 2014)] [Historical solar and geomagnetic data charts 1954-2006 (last update April 5, 2007)] [Archived reports since January 2003 (last update April 2, 2014)] [POES auroral activity level October 2009 - December 2012][Solar polar fields vs solar cycles - updated March 16, 2014] [Presentation 3rd SSN Workshop, Tucson, 2013 (pdf)] Recent activity The geomagnetic field was inactive on April 10.
Solar wind speed at SOHO ranged between 345 and 461 km/s. IPS - Solar Conditions - Monthly Sunspot Numbers. (last updated 18 Apr 2014 14:03 UT) In more detail, the table above shows observed sunspot numbers (12 month smoothed) followed by estimated and predicted values.
Estimated values have 'e' suffix indicating they are based partly on observed and partly on predicted data. Values in the table earlier than estimated values are observed; later values are predicted. Although the prediction of solar cycles is difficult, it has practical applications. For example, in planning High Frequency (HF) communication links it is important to estimate what frequencies will be supported by the ionosphere well into the future. Solar Terrestrial Dispatch - Leaders in Space Weather Forecasting Services.
SIDC - Solar Influences Data Center. Space Weather Alerts from SWPC. On-line SWPC Weekly Publication in Adobe Acrobat(R) format.