- 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 263 Issued at 2200Z on 20 Sep 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 2 numbered sunspot regions on the disk. |
| IB. Solar Activity Forecast Solar activity is expected to be very low with a slight chance for a C-class flare on days one, two, and three (21 Sep, 22 Sep, 23 Sep). |
| 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 533 km/s at 19/2118Z. Total IMF reached 6 nT at 20/2016Z. The maximum southward component of Bz reached -4 nT at 20/1158Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 33761 pfu. |
| IIB. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet to unsettled levels on days one and three (21 Sep, 23 Sep) and quiet levels on day two (22 Sep). |
Product: 3-Day Forecast - Issued: 2017 Sep 21 0030 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 3 (below NOAA Scale levels). The greatest expected 3 hr Kp for Sep 21-Sep 23 2017 is 3 (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 Sep 18 0327 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 |
| The Big Corona | |||
|
|||
2017 September 20 |
|||
Explanation: Most photographs don't adequately portray the magnificence of the Sun's corona. Seeing the corona first-hand during a total solar eclipse is unparalleled. The human eye can adapt to see coronal features and extent that average cameras usually cannot. Welcome, however, to the digital age. The featured picture is a combination of forty exposures from one thousandth of a second to two seconds that, together, were digitally combined and processed to highlight faint features of the total solar eclipse that occurred in August of 2017. Clearly visible are intricate layers and glowing caustics of an ever changing mixture of hot gas and magnetic fields in the Sun's corona. Looping prominences appear bright pink just past the Sun's limb. Faint details on the night side of the New Moon can even be made out, illuminated by sunlight reflected from the dayside of the Full Earth. |
|||
| High Resolution Image | |||
| Tomorrow’s Image: open space | |||
| Credit & Copyright: Alson Wong | |||
| 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