File:DOI Foundation.svgwork, hereby publish it under the following licenses: You may select the license of your choice. English DOI Foundation logo determination method: SHA-1
File:DOI logo.svgEnglish Logo for the Digital Object Identifier (DOI) Zulu Uphawu le-Digital Object Identifier (DOI) determination method: SHA-1
File:Sumatra Volcanoes.pnglocked fault zone extending into the mantle, J. of Geophysical Research, 109. DOI: 10.1029/2003JB002958. Volcanoes location was traced from en:Google Earth