Global Volcanism Program | Image GVP-03701
Renewed growth of the lava dome in the summit crater began in 1957. By the time of this aerial photo from the NE in 1961, lava had spilled over a notch in the northern crater rim and produced the lava flow seen here descending the northern flank to the lower right. By the end of 1962 the flow had traveled 1 km from the summit, reaching the caldera floor.
Photo from Mooser and Maldonando-Koerdell 1961 (XIIIth General Assembly IUGG).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.