Space Weather Observations, Alerts, and Forecast
Real Time Images of the Sun
SOHO EIT 304
SOHO EIT 284
Mauna Loa Solar Image
The sun is constantly monitored for sun spots and coronal mass ejections. EIT (Extreme ultraviolet Imaging Telescope) images the solar atmosphere at several wavelengths, and therefore, shows solar material at different temperatures. In the images taken at 304 Angstrom the bright material is at 60,000 to 80,000 degrees Kelvin. In those taken at 171 Angstrom, at 1 million degrees. 195 Angstrom images correspond to about 1.5 million Kelvin, 284 Angstrom to 2 million degrees. The hotter the temperature, the higher you look in the solar atmosphere.
Solar activity was at very low levels. Region 2390 (S17W13, Dai/beta-gamma) underwent decay as it lost penumbra in its intermediate spots. The region appeared to become more magnetically simple early in the period, but regained opposite polarity umbra amongst the trailer spots as the period progressed - indicative of continued minor magnetic instability. The region remained predominantly stable as only a few weak, B-class and optical subflares were observed during the period. Region 2389 (S12E23, Cro/beta) decayed further as it lost penumbral coverage and decreased in total area. The region was in a simple bipolar configuration, but retained some weak, E-W aligned magnetic shear. Region 2391 (N05E71, Hsx/alpha) was quiet and unchanged as it rotated further onto the visible disc. A prominence located along the NE limb at about N18E90, was active and lost some density, but remained in place as material was reabsorbed. No Earth-directed coronal mass ejections (CMEs) were observed in available coronagraph imagery.
Solar Activity Forecast
Issued: 2015 Jul 28 0030 UTC
Solar activity is expected to be very low with a chance for C-class activity for the next three days (28-30 Jul) primarily due to the flare potential of Region 2390. Energetic
Real Time Solar X-ray and Solar Wind
Solar Cycle Progression
Solar Cycle chart updated using the latest ISES predictions.
Real-Time Solar Wind
Real-Time Solar Wind data broadcast from NASA's ACE satellite.
The Solar Cycle is observed by counting the frequency and placement of sunspots visible on the Sun. Solar minimum occurred in December, 2008. Solar maximum is expected to occur in May, 2013.
Solar X-ray Flux
This plot shows 3-days of 5-minute solar x-ray flux values measured on the SWPC primary and secondary GOES satellites.
Satellite Environment Plot
The Satellite Environment Plot combines satellite and ground-based data to provide an overview of the current geosynchronous satellite environment.
Auroral Activity Extrapolated from NOAA POES
Northern Hemi Auroral Map
Southern Hemi Auroral Map
Instruments on board the NOAA Polar-orbiting Operational Environmental Satellite (POES) continually monitor the power flux carried by the protons and electrons that produce aurora in the atmosphere. SWPC has developed a technique that uses the power flux observations obtained during a single pass of the satellite over a polar region (which takes about 25 minutes) to estimate the total power deposited in an entire polar region by these auroral particles. The power input estimate is converted to an auroral activity index that ranges from 1 to 10.
Credits:Space Weather Images and Information (excluded from copyright) courtesy of: NOAA / NWS Space Weather Prediction Center, Mauna Loa Solar Observatory (HAO/NCAR), and SOHO (ESA & NASA).
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