lithosphere

EARTH Magazine: Hidden Double Earthquakes Spells Trouble for Tsunami Warning Systems

EARTH Magazine

From EARTH Magazine, 03/08/2016  --  A magnitude-7.1 earthquake struck Chile on Jan. 2, 2011, or so scientists thought. Now, with increasing sensor sensitivity and advances in the quantitative analysis of earthquakes, scientists have revealed that this quake was actually a doublet. This meant that instead of just one massive quake, two similarly large earthquakes struck very near to one another within seconds. 

Teachable Moment from IRIS - Magnitude 7.8 Southwest of Sumatra, Indonesia

IRIS

March 2, 2016  --  IRIS does an excellent job collecting and preparing resources we can use in our classrooms on recent, significant earthquakes. Check out their PowerPoint, visualizations and animations on a 7.8 magnitude earthquake occurred 800 km off the west coast of southern Sumatra, Indonesia, as a result of strike ­slip faulting within the mantle lithosphere of the Indo-­Australia Plate. 

IRIS page: http://www.iris.edu/hq/retm/4022

EARTH Magazine: Urban Geology - An Emerging Discipline in an Increasingly Urbanized World

EARTH Magazine

From EARTH Magazine, 03/01/2016  --  More than half of the total human population on Earth lives in urban areas, where, like rural areas, geology affects us every day. Yet when we think about "geology," most of us think of the hinterlands. That needs to change, argue the authors of a new feature in EARTH Magazine discussing what the role of urban geology is, what it can be and the potential role geoscience organizations can play in curating the geologic data revealed during construction, excavations and surveys.

EARTH Magazine: Slipping Point - Snow Scientists Dig In to Decipher Avalanche Triggers

EARTH Magazine

From EARTH Magazine, 02/22/2016  --  As skiers hit the slopes this winter, EARTH Magazine explores the science of how to keep them and other winter explorers safe. Every year, hundreds of people are killed by avalanches. Understanding the science of the frozen environment is only part of this story; communicating the risk is a field as dynamic as the weather systems and terrains that foster avalanches.

EARTH Magazine: Revealing Potential Tsunami Inundation on California Coast

EARTH Magazine

From EARTH Magazine, 02/17/2016  --  Tsunami hazard maps exist for California coastlines, but recent geological studies indicated some faults may be capable of unleashing more powerful quakes than previously thought. Given this new information, researchers at the University of California Riverside wondered if the current tsunami hazard maps adequately predict inundation zones, or if they need to be updated.

Teachable Moment from IRIS - Magnitude 7.1 Southern Alaska

IRIS

01/24/2016  --  IRIS does an excellent job collecting and preparing resources we can use in our classrooms on recent, significant earthquakes. Check out their PowerPoint, visualizations and animations on a magnitude 7.1 earthquake that knocked items off shelves and walls in Alaska early Sunday. The earthquake was widely felt because it was close to Alaska’s population centers. There were no reports of injuries, but four homes were lost to natural gas explosions or fire following the earthquake.

EARTH Magazine: Lake Sediments Suggest Mild Volcanic Winter After Massive Toba Eruption

EARTH Magazine

From EARTH Magazine, 01/15/2016  -- Toba volcano erupted 74,000 years ago, and is thought to have been the largest eruption in the last 2.5 million years. Some scientists have thought the fallout from the eruption caused a volcanic winter so catastrophic it almost drove humans to extinction. A new high-resolution study of lake sediments from East Africa disputes that idea, however, suggesting that the early humans in the area probably experienced little or no cooling following the massive eruption.

EARTH Magazine: The Snowmastodon Project - Mammoths and Mastodons Lived the High Life in Colorado

EARTH Magazine

From EARTH Magazine  --  While expanding a reservoir in Snowmass Village, Colorado, workers stumbled upon a big bone. And then another, and another, and another. Realizing they found something special, the workers called in the experts at the Denver Museum of Nature & Science (DMNS), who drove several hours to examine the site. Scientists quickly realized that this was no ordinary boneyard. Work on the reservoir halted, as DMNS scientists called in dozens of volunteers and experts from around the country to help excavate the site before construction continued.

Pages