A chromospheric wave caused by a filament eruption as seem by PICS in H-alpha. The same event as seen by the CHIP Helium-I imager is discussed in the figure to the right.
A time sequence of images from the Mauna Loa Helium-I (CHIP) instrument showing the progression of a chromospheric wave associated with a filament eruption and an X-level flare on August 24, 1998. The event had a good association with the severe geomagnetic storm at Earth on August 27.
