Spaceweather.com regarding Radiation received while flying during a solar flare

RADS ON A PLANE, CONTINUED: Regular readers may remember last month's reports by Dr. Tony Phillips of radiation measurements inside commercial airplanes. During a cross-country trip between Reno, Nevada, and Washington DC, he absorbed a dose of ionizing radiation equal to about 3 dental x-rays.

However, not every trip is so "radioactive." On Dec. 17th, he flew from Reno to San Francisco--a short hop over the Sierras to attend the American Geophysical Union meeting--and the dose was much less. These curves show his measurements during the flight:

Compared to last month's travel, there was relatively little radiation on this flight. From take-off to landing, the total dose was only about 3% of a dental X-ray -- a hundred times less than before.
Why so little? For one thing, the flight was brief, less than an hour long. Moreover, it was low. The cruising altitude of the small commuter jet was only 26,000 feet compared to as much as 39,000 feet for last month's cross-country flights. When it comes to "rads on a plane," altitude matters. The source of the radiation is cosmic rays from space; the closer you are to space, the more radiation you are going to absorb. Short, low flights like the Reno to San Francisco hop are best for avoiding exposure.
The data come from a pair of radiation detectors routinely flown to the stratosphere onboard Earth to Sky Calculus Space Weather Buoys. The pager-sized devices are sensitive to ionizing radiation such as X-rays and gamma-rays in the energy range 10 keV to 20 MeV. Ideally, the two detectors should register the same dose rates throughout the flight. Slight differences between the two curves are an indication of the uncertainty in the measurements.
It is important to note that the sensors Phillips carried onboard the plane do not detect one of the most important forms of radiation: neutrons. Neutrons provide much of the biologically effective radiation dose at altitudes of interest to aviation and space tourism. To account for these uncharged particles, the doses discussed above should be doubled or tripled. To improve our estimates of the total dose rate, the students of Earth to Sky Calculus are evaluating neutron detectors for future balloon missions and plane flights.
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http://www.spaceweather.com/

This kind of research is important to anyone sensitive to the radiation from solar flares especially people with heart conditions or possibly even susceptible to strokes. More research of this kind needs to be done especially during solar flares with flights.

It is possible that heart conditions and strokes and other maladies might be increased during flights during solar flares hitting the earth.

I myself had such an experience on October 8th 2012 flying back from Maui where I had heart problems because of exposure to the Solar Flare. I didn't have a heart attack or stroke that I know of but I knew something was wrong and as an intuitive had heard from others that heart attacks or other heart problems often happen to some people when exposed to large enough solar flares and this is only multiplied many times depending what altitude you are at or if you are far north or far south into the Arctic or Antarctic Circle. When I returned I had to go see a heart specialist who put me on lisinopril after taking a carotid artery sonogram and they found I had low heart compression and needed to take lisinopril which is an ace inhibitor that helps circulation etc.

So, research of this kind is very important so more people can know about this if they already have existing heart conditions where flying might take them over the edge into a bad experience or even death when at altitude during a large Solar flare aboard an airliner somewhere over earth.