Solar activity
What the Sun itself is doing: how bright it is in X-rays, which regions carry the twisted magnetic fields that produce flares, and what has actually erupted.
X-ray flux and the current flare
LiveB3.3
Minor; no noticeable effects.
- Reading taken
- 2026-11-03 09:46 UTC
- Satellite
- GOES-18
- Event began
- 2026-11-03 06:08 UTC
- Peak
- 2026-11-03 06:15 UTC · B4.8
- Event ended
- 2026-11-03 06:19 UTC
10.7 cm radio flux
F10.7
Live97sfu
Moderate activity
A typical mid-cycle value. Active regions are present and capable of producing flares.
- Measured
- 2026-11-02 20:00 UTC
- Type
- Published index
- Provider
- NOAA Space Weather Prediction Center
A disc-integrated index in solar flux units (10⁻²² W m⁻² Hz⁻¹), measured daily.
Why this index
The 10.7 cm radio flux has been measured daily since 1947, which makes it the longest continuous instrumental record of solar activity. It tracks the magnetic complexity of the corona closely enough to serve as a proxy for it, and unlike sunspot counting it does not depend on an observer's judgement or on clear skies.
Active regions on the visible disc
Live4 numbered active regions in the report for 2026-11-03, with 4 sunspots counted across 3 of them — NOAA published no spot count for the 1 remaining.
| Region | Location | Area | Spots | Class | M / X flare chance |
|---|---|---|---|---|---|
| 4562 | S17W57 | — | — | — | 0% / 0% |
| 4564 | N02W01 | 10 | 1 | — | 0% / 0% |
| 4565 | N16E20 | 70 | 1 | — | 0% / 0% |
| 4566 | S03E59 | 20 | 2 | — | 0% / 0% |
Catalogued solar flares
UnavailableThe DONKI flare catalogue could not be read from NASA DONKI. No value is shown, and none is substituted from anywhere else.
Reason: NASA DONKI could not be reached: The operation was aborted due to timeout
Catalogued coronal mass ejections
UnavailableThe DONKI CME catalogue could not be read from NASA DONKI. No value is shown, and none is substituted from anywhere else.
Reason: NASA DONKI could not be reached: The operation was aborted due to timeout
Two kinds of flare record
The X-ray panel above is an instrument reading: the flux GOES is measuring in the 1–8 Ångström band at this moment, expressed as a flare class. It is current to the minute and it is not curated. A flare in progress has no end time and its class can still rise.
The catalogued flares are a research record: events reviewed by NASA CCMC analysts, with begin, peak and end times and an associated active region. Curation lags the event by hours, so the most recent hours are routinely incomplete. An empty catalogue is not evidence of a quiet Sun.
AsteriaStar shows both and never merges them. They are produced by different processes with different latencies and different purposes, and a single combined list would inherit the weaknesses of each.
Provenance
Every value on these pages is fetched from NOAA SWPC or NASA CCMC and carries the provider's own timestamp. Nothing is simulated, interpolated or filled in: when a provider cannot be reached, the panel says so and shows no number. There is no overall “space weather score” here — the agencies publish scales, and a single figure invented on top of them would be an opinion wearing NOAA's authority.
GOES X-ray flare state
Live- Status
- Live
- Kind
- Observation
- Provider
- NOAA Space Weather Prediction Center
- Organisation
- NOAA / National Weather Service
- Fetched
- 2026-11-03 09:49 UTC
- Generated by provider
- 2026-11-03 09:46 UTC
- Provider cadence
- 1 min
- Cached for
- 1 min
- Treated as stale after
- 3 h
- Licence
- Public domain (US Government work). No licence fee and no redistribution restriction.
Source file: https://services.swpc.noaa.gov/json/goes/primary/xray-flares-latest.json
GOES X-ray flare (latest) from NOAA Space Weather Prediction Center, fetched from https://services.swpc.noaa.gov/json/goes/primary/xray-flares-latest.json. GOES X-ray fluxes are published each minute; the cache matches the cadence.
The current or most recent flare seen by the primary GOES satellite in the 1–8 Ångström band. A flare in progress has no end time yet, and its class can still rise.
Active regions
Live- Status
- Live
- Kind
- Observation
- Provider
- NOAA Space Weather Prediction Center
- Organisation
- NOAA / National Weather Service
- Fetched
- 2026-11-03 09:49 UTC
- Generated by provider
- 2026-11-03 00:00 UTC
- Provider cadence
- 1 d
- Cached for
- 1 h
- Treated as stale after
- 4 d
- Licence
- Public domain (US Government work). No licence fee and no redistribution restriction.
Source file: https://services.swpc.noaa.gov/json/solar_regions.json
Solar active regions (daily report) from NOAA Space Weather Prediction Center, fetched from https://services.swpc.noaa.gov/json/solar_regions.json. A once-daily synoptic report. An hour's cache cannot make a daily product stale.
Numbered active regions from the daily solar region summary, with sunspot area, magnetic and spot classification. The spot totals here are counts within numbered regions and are NOT the International Sunspot Number, which is defined differently and published by SILSO.
10.7 cm radio flux
Live- Status
- Live
- Kind
- Published index
- Provider
- NOAA Space Weather Prediction Center
- Organisation
- NOAA / National Weather Service
- Fetched
- 2026-11-03 09:49 UTC
- Generated by provider
- 2026-11-02 20:00 UTC
- Provider cadence
- 1 d
- Cached for
- 1 h
- Treated as stale after
- 4 d
- Licence
- Public domain (US Government work). No licence fee and no redistribution restriction.
Source file: https://services.swpc.noaa.gov/products/summary/10cm-flux.json
10.7 cm solar radio flux from NOAA Space Weather Prediction Center, fetched from https://services.swpc.noaa.gov/products/summary/10cm-flux.json. F10.7 is a daily index; an hour's cache is far finer than its resolution.
The daily 10.7 cm radio flux in solar flux units, the standard long-run proxy for solar activity. It is a disc-integrated index, not a measure of any one region.
DONKI flare catalogue
Unavailable- Status
- Unavailable
- Kind
- Observation
- Provider
- NASA DONKI
- Organisation
- NASA Goddard Space Flight Center / Community Coordinated Modeling Center
- Provider cadence
- 1 h
- Cached for
- 15 min
- Treated as stale after
- 6 h
- Licence
- Public domain (US Government work), subject to NASA's media usage guidelines.
Source file: https://kauai.ccmc.gsfc.nasa.gov/DONKI/WS/get/FLR?startDate=2026-10-04&endDate=2026-11-03
Solar flare catalogue from NASA DONKI, fetched from https://kauai.ccmc.gsfc.nasa.gov/DONKI/WS/get/FLR?startDate=2026-10-04&endDate=2026-11-03. A curated catalogue updated by analysts through the day, not a live stream; fifteen minutes bounds the delay on a newly-catalogued event without polling a research service every request.
Analyst-curated flare records for the last 30 days, with begin, peak and end times and the associated active region. Curation lags the event, so the most recent hours may be incomplete — an absent flare is not evidence of a quiet Sun.
Why there is no value: NASA DONKI could not be reached: The operation was aborted due to timeout
Sources & references
The primary and reference sources this topic draws on.
- NOAA SWPCNOAA Space Weather Prediction Center
Space-weather forecasts and alerts: aurora (OVATION), the Kp index, and the G1–G5 geomagnetic storm scale.
- NASA DONKINASA Community Coordinated Modeling Center
The Space Weather Database Of Notifications, Knowledge, Information: solar flares, CMEs, and geomagnetic storms.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.