- Home
- Forecast
- Radar
- Maps
- WX-Data
- WX-Misc.
- Astronomy
- Fire
- About
- Links
Air Quality
DondelingerPhotography
| Advisories / Alerts |
Info Links
|
|||||
|
|
|
|
|
|||||
 |
| Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 201 Issued at 2200Z on 20 Jul 2017 |
| IA. Analysis of Solar Active Regions and Activity from 19/2100Z to
20/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 0 numbered sunspot regions on the disk. |
| IB. Solar Activity Forecast Solar activity is expected to be very low with a chance for a C-class flares on day one (21 Jul) and expected to be very low on days two and three (22 Jul, 23 Jul). |
| IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 506 km/s at 20/2037Z. Total IMF reached 10 nT at 20/1650Z. The maximum southward component of Bz reached -8 nT at 20/1757Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 11443 pfu. |
| IIB. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on days one and three (21 Jul, 23 Jul) and quiet to active levels on day two (22 Jul). |
Product: 3-Day Forecast - Issued: 2017 Jul 20 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center.
Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA Scale levels). The greatest expected 3 hr Kp for Jul 20-Jul 22 2017 is 4 (below NOAA Scale levels).
|
|||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||
|
Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.
Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-13 over the past 24 hours, was below S-scale storm level thresholds.
|
Rationale: No S1 (Minor) or greater solar radiation storms are expected. No significant active region activity favorable for radiation storm production is forecast.
Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
|
|||||||||||||
Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast.
Product: 27 day Space Weather Outlook - Issued: 2017 Jul 17 0154 UTC
|
|
|
|||||||
| This plot shows 3-days of 5-minute solar x-ray flux values measured on the SWPC primary and secondary GOES satellites. | The Satellite Environment Plot combines satellite and ground-based data to provide an overview of the current geosynchronous satellite environment. |
|
|
|
|
|||||||
| Large Angle and Spectrometric Coronagraph (LASCO). | Real-Time Solar Wind data broadcast from NASA's ACE satellite. |
|
|||||||
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. |
|
|||||||||||||||||||
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. |
|
|
|
|||||||
|
|||||||
| This plot shows the Solar Cycle Sun Spot Number Progression. | This plot shows the F10.7cm Radio Flux Progression. |
|
|||||||
| This plot shows the Solar Cycle Ap Progression. | Sunspot Cycle 22, 23, and 24 |
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 was expected to occur in May, 2013.
 |
|
|
|
| Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach. |
| Source: Space Weather.com |
| IC 1396: Emission Nebula in Cepheus | |||
|
|||
2017 July 20 |
|||
Explanation: Stunning emission nebula IC 1396 mixes glowing cosmic gas and dark dust clouds in the high and far off constellation of Cepheus. Energized by the bright central star seen here, this star forming region sprawls across hundreds of light-years, spanning over three degrees on the sky while nearly 3,000 light-years from planet Earth. Among the intriguing dark shapes within IC 1396, the winding Elephant's Trunk nebula lies just below center. Stars could still be forming inside the dark shapes by gravitational collapse. But as the denser clouds are eroded away by powerful stellar winds and radiation, any forming stars will ultimately be cutoff from the reservoir of star stuff. The gorgeous color view is a composition of image data from narrowband filters, mapping emission from the nebula's atomic oxygen, hydrogen, and sulfur into blue, green, and red hues. |
|||
| High Resolution Image | |||
| Tomorrow’s Image: pixels in space | |||
| Credit & Copyright: César Blanco González | |||
| Courtesy of Astronomy Picture of the Day Index - Main Page & Astronomy Picture of the Day |
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).
Past 7 Days of Astronomy Pic of the DayPowered by Space Weather PHP script by Mike Challis
additions by Martin of Hebrides Weather, Ken True of Saratoga Weather,
Jerry Wilkins of Southeast Lincoln Weather and Jeremy Dyde of Jerbils Weather
Ambient Weather VWS v14.00 Top Contact