- Home
- Forecast
- Radar
- Maps
- WX-Data
- WX-Misc.
- Astronomy
- Fire
- About
- Links
Air Quality
| Advisories / Alerts |
|
|
|
|
|
|
Info Links
|
|||||
|
|
|
|
|
|||||
 |
| Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 297 Issued at 2200Z on 24 Oct 2021 |
| IA. Analysis of Solar Active Regions and Activity from 23/2100Z to
24/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 3 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 and a slight chance for an M-class flare on days one, two, and three (25 Oct, 26 Oct, 27 Oct). |
| IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 373 km/s at 24/2052Z. Total IMF reached 6 nT at 24/0820Z. The maximum southward component of Bz reached -5 nT at 24/0831Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 151 pfu. |
| IIB. Geophysical Activity Forecast The geomagnetic field is expected to be at quiet levels on days one and two (25 Oct, 26 Oct) and quiet to unsettled levels on day three (27 Oct). |
Product: 3-Day Forecast - Issued: 2021 Oct 24 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 1 (below NOAA Scale levels). The greatest expected 3 hr Kp for Oct 24-Oct 26 2021 is 2 (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-16 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: There is a slight chance for isolated R1-R2 (Minor-Moderate) radio blackout conditions over 24-26 Oct.
Product: 27 day Space Weather Outlook - Issued: 2021 Oct 18 0131 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.
Space Weather Forecast Unavailable
Error reading Space Weather update data.
| 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 |
| Halloween and the Ghost Head Nebula | |||
|
|||
2021 October 24 |
|||
Explanation: Halloween's origin is ancient and astronomical. Since the fifth century BC, Halloween has been celebrated as a cross-quarter day, a day halfway between an equinox (equal day / equal night) and a solstice (minimum day / maximum night in the northern hemisphere). With a modern calendar however, even though Halloween occurs next week, the real cross-quarter day will occur the week after. Another cross-quarter day is Groundhog Day. Halloween's modern celebration retains historic roots in dressing to scare away the spirits of the dead. Perhaps a fitting tribute to this ancient holiday is this view of the Ghost Head Nebula taken with the Hubble Space Telescope. Similar to the icon of a fictional ghost, NGC 2080 is actually a star forming region in the Large Magellanic Cloud, a satellite galaxy of our own Milky Way Galaxy. The Ghost Head Nebula (NGC 2080) spans about 50 light-years and is shown in representative colors. |
|||
| High Resolution Image | |||
| Tomorrow’s Image: highway to hole | |||
| Credit : Mohammad Heydari-Malayeri (Observatoire de Paris) et al., ESA, NASA | |||
| 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).
Space Weather links:
|
|
Related Links: |
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