Harras of DhamarThe Harras of Dhamar is a volcanic field in Yemen.Morphology and eruptionThe volcanic field extends to the south of Dhamar town. The field contains many stratovolcanoes, lava flows, and youthful cones. Basaltic lava flows overlie older Rhyolitic flows. The volcano is responsible for the only 20th-century eruption on the Arabian Peninsula, apparently in 1937. The field is southeast from Yemen's capital city, Sana'a.