Krakatau, a volcanic island in Indonesia, killed more than 30,000 people when it erupted in 1883. One might assume that volcanic debris posed the major threat, yet many of the victims died from a tsunami caused by the volcanic eruption instead.

A volcano that has been silent since about 1550 began erupting after a big quake. A radar satellite recorded its lava spreading, twice every 12 days.

Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as massive rafts floating on a sea of partially molten rock, constantly moving at a ...

When we think of a volcanic eruption, rivers of glowing lava or giant columns of ash come to mind. But beneath Earth's surface, a more complex story is unfolding. Magma deep within volcanoes is more than molten rock.

University of Birmingham volcanologist Mike Cassidy argued that the biggest danger could come, not from Yellowstone and Mount Etna, but from hidden volcanoes that appear dormant and are barely monitored. AP It’s the quiet ones you have to watch out for.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The recent eruption of Italy's Stromboli volcano has the potentially deadly natural phenomenon on everyone's radar as Hawaii's ...

Magma moving beneath a volcano can make the ground rise, sink or shift sideways. Measuring these changes gives scientists clues about where magma is stored and how it travels. A study published in Geodesy and Geodynamics used satellite radar to examine the November 2025 eruption of Hayli Gubbi in Ethiopia's Afar Depression.

Indonesia is witnessing an extraordinary burst of volcanic activity, with six volcanoes — Ili Lewotolok, Anak Krakatau, Mount Ibu, Mount Semeru, Lewotobi Laki-laki and Sinabung — recording eruptions around the same period.

Explore the dramatic valley setting of San Salvador, El Salvador, from the sky. The drone flight centers on the Historic Center, soaring over the majestic blue domes of the Metropolitan Cathedral and the grand National Palace.