stock here, first some resources from A-Eye. Noted the first data link, NASA, stops providing any flare data in 2017. Quite odd. And like USGS data, its in an extremely unfriendly format for data analysis. Typical.
To find detailed records of X-class solar flares, you can access several comprehensive databases. Here are some reliable sources:
NASA’s Interactive Multi-Instrument Database of Solar Flares:
This database provides a searchable catalog of solar flare events. It allows users to explore light curves, flare images, and related observational data from multiple instruments. The database is designed for in-depth research and analysis of solar flare activities.
NASA Interactive Multi-Instrument Database of Solar Flares
National Centers for Environmental Information (NCEI):
https://data.nas.nasa.gov/helio/portals/solarflares/solarflares_index.html
NCEI archives solar flare data collected from various observatories and satellites, including data on X-ray flares from the GOES satellites since 1975. The database includes detailed records and measurements for each flare event.
NCEI Solar Flare Data
NOAA Space Weather Prediction Center (SWPC):
The SWPC provides X-ray flux data from the GOES satellites, which is used to monitor and record solar flares. This site offers dynamic plots and numerical data for ongoing and past solar flare activities.
NOAA SWPC GOES X-ray Flux
These resources will give you access to detailed historical data on X-class solar flares and other relevant solar activity information.