universetoday.com
Solar Flares Altered Mars' Atmosphere - Universe Today
Boston University astronomers announced today that they've found evidence that solar flares change the upper Martian atmosphere. The researchers found that when X-ray bursts from the Sun reach Mars, they cause the planet's ionosphere to produce additional ions and electrons - exactly the same situation was recorded simultaneously by satellites here on Earth. The measurements were made by NASA's Mars Global Surveyor as it transmitted data back to Earth.