Map of Alaska locating an 8.2-magnitude earthquake that struck late Wednesday. An 8.2 magnitude earthquake struck off the Alaskan peninsula late Wednesday, the United States Geological Survey said, prompting a tsunami warning. The earthquake hit 56 miles (91 kilometers) southeast of the town of Perryville, the USGS said. The US […]

Regional map showing the location of Anak Krakatau. Credit: National Oceanography Centre and British Geological Survey For the first time, scientists have been able to study the deposits of a volcanic island landslide-tsunami immediately after the incident with the benefit of modern acoustic equipment. Dr James Hunt from the National […]

Evolution of earthquake-induced tsunami in a bay traversed by a strike-slip fault. Colors indicate sea-surface height relative to undisturbed water level; wave height may exceed 2 m in some places. Top: Instantaneous tsunami generation phase coincident with earthquake propagation; Middle: postseismic tsunami generation phase, in which gravity-driven tsunami waves dominate; […]

March 1, 2007, March 14, 2011, February 28, 2021 On March 11, 2011, a magnitude 9.1 earthquake jolted the seafloor about 70 kilometers (45 miles) offshore of Japan’s Tohoku region. It was the largest quake recorded in Japan and the fourth largest in the world since seismic recording began around […]

At some point in the future, Anak Krakatoa will erupt again, generating more tsunamis (Credit: The Wild Eyed/Shutterstock) The August 1883 eruption of Krakatoa was one of the deadliest volcanic explosions in modern history. The volcano, found in the middle of the Sunda Strait in between two of Indonesia’s largest […]

Map of the Cascadia subduction zone. Megathrust earthquakes and subsequent tsunamis that originate in subduction zones like Cascadia — Vancouver Island, Canada, to northern California — are some of the most severe natural disasters in the world. Now a team of geoscientists thinks the key to understanding some of these […]

The unstable terrain that poses a landslide threat lies between the Cascade Glacier and Barry Arm Glacier, which has been steadily retreating over the last decade. The above satellite images show the glacier’s retreat from 2013 (above) to 2019 (below). Credit: NASA Earth Observatory images by Lauren Dauphin, using Landsat […]

Animation In a new study, published in the journal Nature, an international team of scientists provides the first conclusive evidence directly linking deep Earth’s water cycle and its expressions with magmatic productivity and earthquake activity. Water (H2O) and other volatiles (e.g. CO2 and sulfur) that are cycled through the deep Earth […]

A concrete wall on the coast of Japan. Careful engineering of low, plant-covered hills along shorelines can mitigate tsunami risks with less disruption of coastal life and lower costs compared to seawalls. In tsunami preparedness, it turns out there can be strength in beauty. Rows of green hills strategically arranged […]