Space Weather Observations, Alerts, and Forecast

 Space Weather Observations, Alerts, and Forecast


( Latest Alert ) - Issue Time: 2021 Jul 28 1922 UTC - Read More
WARNING: Geomagnetic K-index of 4 expected
Geomagnetic Field 24-hr max Current Geomagnetic Field
Kp=2 - Quiet
Kp=1 - Quiet
Solar X-rays Alert 24-hr max Solar X-rays Alert 2-hr max
A8.43 - Normal
A7.72 - Normal
Solar X-rays Last Event max Current Solar X-rays Alert
Standby - New Event
A0.10 - Normal
Current Solar Wind Density Current Solar Wind Speed
2.33 protons/cm3
403km/s Slightly Elevated
Strength of the IMF (Bt) PRI >10MeV Solar P. 24hr max
3.27 (Bt) - Normal
Missing Data




  Solar activity report




There's something on the wing Solar Flares, Sun spots
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 213 Issued at 2200Z on 01 Aug 2021
IA. Analysis of Solar Active Regions and Activity from 31/2100Z to 01/2100Z:
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 on days one, two, and three (02 Aug, 03 Aug, 04 Aug).
IIA. Geophysical Activity Summary 31/2100Z to 01/2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 431 km/s at 31/2156Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 483 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels on days one, two, and three (02 Aug, 03 Aug, 04 Aug).

3-day Solar-Geophysical Forecast


Product: 3-Day Forecast - Issued: 2021 Aug 01 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center.

CURRENT TIME
(based on your computer's time):   UTC..
Local

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 Aug 01-Aug 03 2021 is 3 (below NOAA Scale levels).

NOAA Kp index breakdown Aug 01 to Aug 03 2021
Aug 01 Aug 02 Aug 03
Forecast High  
3
3
2
00-03UT 2 3 2
03-06UT 1 2 1
06-09UT 0 2 1
09-12UT 1 2 1
12-15UT 2 2 1
15-18UT 3 2 1
18-21UT 3 2 2
21-00UT 2 2 2
Past 24 Hour Planetary Kp Now
1
2
1
0
1
1
1
1
Geomagnetic Activity Probabilities For - Aug 02 to Aug 04
Middle Latitudes 0-24 hr 24-48 hr 48-72 hr
Active 10% 10% 10%
Minor Storm 1% 1% 1%
Major-severe storm 1% 1% 1%
High Latitudes 0-24 hr 24-48 hr 48-72 hr
Active 15% 15% 15%
Minor Storm 20% 20% 20%
Major-severe storm 15% 15% 15%

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.

Solar Radiation Storm Forecast for Aug 01 to Aug 03 2021
Aug 01 Aug 02 Aug 03
S1 or greater 1% 1% 1%

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.

Radio Blackout Forecast for Aug 01 to Aug 03 2021
Aug 01 Aug 02 Aug 03
R1-R2 1% 1% 1%
R3 or greater 1% 1% 1%

Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast.



3-day Solar-Geophysical Forecast


Product: 27 day Space Weather Outlook - Issued: 2021 Jul 26 0122 UTC

Radio Flux
10.7 cm
Planetary
A Index
Largest
Kp Index
2021 Jul 26 82 5 2
2021 Jul 27 82 5 2
2021 Jul 28 82 12 4
2021 Jul 29 82 12 4
2021 Jul 30 82 8 3
2021 Jul 31 82 5 2
2021 Aug 01 82 5 2
2021 Aug 02 78 8 3
2021 Aug 03 75 5 2
2021 Aug 04 75 5 2
2021 Aug 05 75 5 2
2021 Aug 06 75 5 2
2021 Aug 07 75 5 2
2021 Aug 08 75 5 2
2021 Aug 09 75 5 2
2021 Aug 10 75 12 4
2021 Aug 11 75 10 3
2021 Aug 12 75 5 2
2021 Aug 13 78 5 2
2021 Aug 14 80 5 2
2021 Aug 15 82 5 2
2021 Aug 16 85 10 3
2021 Aug 17 90 8 3
2021 Aug 18 90 5 2
2021 Aug 19 85 5 2
2021 Aug 20 85 5 2



Real Time Solar X-ray and Solar Wind


Solar X-rays Flux 10.7 cm A Index Kp Index
Current A0.10 75 4 1

Solar X-ray Flux
Satellite Environment Plot
Graph showing Real-Time Solar X-ray Flux Graph showing Real-Time Satellite Environment Plot
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.

SolarWind Speed Density Bt Bz
Current 403 km/sec 2.33 p/cm3 Bt 3.27 nT Bz -1.52 nT

Graph - Solar Wind Speed & Temp - Past 24hrs Graph - Solar Wind Density - Past 24hrs
Graph - Strength of the IMF (Bt) Past 24hrs Graph - Direction of the IMF (Bz) Past 24hrs

Graph - Solar Wind, (Bz), (Bt) - Past 12hrs

Latest LASCO Solar Corona
Real-Time Solar Wind
Graph showing current solar cycle progression (click to enlarge) Graph showing Real-Time Solar Wind
Large Angle and Spectrometric Coronagraph (LASCO). Real-Time Solar Wind data broadcast from NASA's ACE satellite.

Auroral Activity Extrapolated from NOAA POES


Northern Hemi Auroral Map
Southern Hemi Auroral Map
Current Northern hemispheric power input map (click to enlarge) Current Southern hemispheric power input 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.


Real Time Images of the Sun


SDO AIA 0171
SDO AIA 0193
SDO MDI Sun Spots
Latest SDO AIA 0171 Latest SDO AIA 0193 Latest SDO HMI Sun Spots
SDO AIA 304
SDO AIA 304 211 171
SDO AIA 211
Latest SDO AIA 304 Latest SDO AIA 304 211 171 image of the sun Latest SDO AIA 211

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 Data - Issued: 2025 UTC - 01 Aug 2021 - Yesterday's Sun Spots (0)
Sunspots last 30 days

Radio Frequency Propagation


VHF and HF Band Conditions

Current HF Propagation Conditions (click to enlarge)
Optimum HF Frequencies for Distant Communications Ionopheric Propagation


Solar Cycle


Sun Spot Number Progression
F10.7cm Radio Flux Progression
Graph showing Sun Spot Number Progression Graph showing F10.7cm Radio Flux Progression
This plot shows the Solar Cycle Sun Spot Number Progression. This plot shows the F10.7cm Radio Flux Progression.

Ap Progression
Sunspot Cycle 22, 23, and 24
This plot shows the Solar Cycle Ap Progression Sunspot Cycle 22, 23, and 24
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.



 Astronomy Picture of the Day


Pluto in Enhanced Color
Pluto in Enhanced Color
2021 August 1

Explanation: Pluto is more colorful than we can see. Color data and high-resolution images of our Solar System's most famous dwarf planet, taken by the robotic New Horizons spacecraft during its flyby in 2015 July, have been digitally combined to give an enhanced-color view of this ancient world sporting an unexpectedly young surface. The featured enhanced color image is not only esthetically pretty but scientifically useful, making surface regions of differing chemical composition visually distinct. For example, the light-colored heart-shaped Tombaugh Regio on the lower right is clearly shown here to be divisible into two regions that are geologically different, with the leftmost lobe Sputnik Planitia also appearing unusually smooth. After Pluto, New Horizons continued on, shooting past asteroid Arrokoth in 2019 and has enough speed to escape our Solar System completely.

  High Resolution Image
Tomorrow’s Image: deep galaxy sounds
Credit : NASA, Johns Hopkins Univ./APL, Southwest Research Inst.
 Courtesy of Astronomy Picture of the Day Index - Main Page & Astronomy Picture of the Day

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