In
October 2012, satellites measured subtle signals that suggested
volcanic activity on remote Heard Island. . These images, captured several
months later, show proof of an eruption on Mawson Peak. . April 7,
2013, Mawson's steep-walled summit crater had filled, and a trickle of
lava had spilled down the volcano’s southwestern flank. . On April 20, the
lava flow remained visible and had even widened slightly just below the
summit.
These natural-color images were collected by the Advanced Land Imager (ALI) on the Earth Observing-1 (EO-1) satellite.