Solar wind
speed: 303.8 km/sec
density: 1.30 protons/cm³
more data: ACE, DSCOVR
Updated: Today at 0531 UT X-ray Solar Flares
6-hr max: M1 1712 UT Apr25
24-hr: M2 2259 UT Apr24
explanation | more data
Updated: Today at: 1735 UT Daily Sun: 25 Apr 24
Expand: labels | no labels | Carrington
Southern sunspot complex AR3638-50 is crackling with M-class solar flares. Credit: SDO/HMI

Sunspot number: 283
What is the sunspot number?
Updated 25 Apr 2024

Spotless Days
Current Stretch: 0 days
2024 total: 0 days (0%)
2023 total: 0 days (0%)
2022 total: 1 day (<1%)
2021 total: 64 days (18%)
2020 total: 208 days (57%)
2019 total: 281 days (77%)
2018 total: 221 days (61%)
2017 total: 104 days (28%)
2016 total: 32 days (9%)
2015 total: 0 days (0%)
2014 total: 1 day (<1%)
2013 total: 0 days (0%)
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
2008 total: 268 days (73%)
2007 total: 152 days (42%)
2006 total: 70 days (19%)
Updated 25 Apr 2024

Thermosphere Climate Index
today: 20.97x10¹⁰ W Warm
Max: 49.4x10¹⁰ W Hot (10/1957)
Min: 2.05x10¹⁰ W Cold (02/2009)
explanation | more data: gfx, txt
Updated 24 Apr 2024

The Radio Sun
10.7 cm flux: 199 sfu
explanation | more data
Updated 25 Apr 2024

Cosmic Rays Solar Cycle 25 is intensifying, and this is reflected in the number of cosmic rays entering Earth's atmosphere. Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining--a result of the yin-yang relationship between the solar cycle and cosmic rays.

Oulu Neutron Counts
Percentages of the Space Age average:
today: -4.5% Low
48-hr change: +0.3%
Max: +11.7% Very High (12/2009)
Min: -32.1% Very Low (06/1991)
explanation | more data
Updated 25 Apr 2024 @ 0700 UT

Current Auroral Oval:

Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation Planetary K-index
Now: Kp= 1.00 quiet
24-hr max: Kp= 1.33 quiet
explanation | more data
Interplanetary Mag. Field
B_total: 4.45 nT
B_z: -1.63 nT south
more data: ACE, DSCOVR