All soft X-ray flares (≥A1.0) with
known positions for the indicated 48 hour interval are shown.
The most recent flares (≤12 hours) are shown as red dots, 12-24 hours as blue
dots and 24-48 hours as turquoise dots; the flare locations are rotated to the time of the image.
Emissions from the western half to the disk – right of central meridian – are most likely to be geo-effective.
The numbers in turquoise designate Active Regions;
numbers in red (on the left hand side of the image) indicate old Regions that are due to return.
Click on an Active Region number if you want to see the report of the selected Region.
Click on an Active Region plot to display the Region Report including the region evolution and flaring history.
Link to the USAF/NOAASolar Region Summary (SRS) file for this date. HEC Search for NOAA Active Regions for this date and the day before.
The images are either magnetograms taken by the SDO/HMI or EUV observations from SDO or PROBA2.
The locations of flares are over-plotted on the images using
various routines in SolarSoft, including those developed by the
HELIO project; movies are formed by stacking the images together.
The centre of the field of view of each image is derived from the location of the active region;
this is interpolated from information given in the NOAA/USAF Solar Active Region Summary
(included as the noaa_active_region_summary list in the
The latitude is the average of all values when the region ifs in the list;
the longitude is calculated by doing a linear fit to the given longitude
(in order to smooth out rounding errors).
An image is created every 6 hours using the closest available FITS file to this time that can be found.
The time interval coverered by the image is indicated in the bottom left hand corner.
Flares for the 48 hours leading up to the time are over-plotted; these are rotated to the time of the FITS image.
The locations of the flares over-plotted on the image are derived from the flare catalogue
prepared by Lockheed Martin (LMSAL, Palo Alto)
and included as the gevloc_sxr_flare list in the
• The size of dot indicated the soft X-ray class of the flare
– the smallest are C class, medium size are M class and the largest are X class.
• The colour of the dot gives a rough indication of when the flare occurred,
with respect to the time in the bottom left of the image.
Red dots are up to 12 hours before the time indicated; blue dots are 12-24 hours;
turquoise dots are 24-48 hours.