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12 June 2018
A summertime expansion in the Earth’s crust caused by changes in groundwater may have triggered the magnitude-6.0 earthquake in California’s wine country in 2014, according to a new study.
30 May 2018
Instruments designed to record earthquakes revealed information about debris-ﬂow speed, the width of the ﬂow and the size of boulders carried by the January 2017 mudslide in Montecito, California, and the location of the event, suggesting that the current generation of seismometers in the ﬁeld could be used to provide an early warning of an incoming debris ﬂow to residents in mudslide-prone areas.
7 May 2018
Hurricanes that intensify rapidly – a characteristic of almost all powerful hurricanes – do so more strongly and quickly now than they did 30 years ago, according to a new study. Many factors are at play, but the chief driver of more rapid hurricane intensification is a natural climate cycle known as the Atlantic Multidecadal Oscillation (AMO) that affects water temperatures in the Atlantic Ocean where hurricanes form, according to the study’s authors.
4 April 2018
High-resolution recordings of the powerful infrasound waves generated by an eruption at Ecuador’s Tungurahua volcano have given scientists a rare view inside the activity at the volcano’s mouth. The acoustic waves generated by the July 2013 eruption were one of the most powerful volcanic infrasound recordings ever captured. The low-frequency infrasound waves from the eruption are too low for human ears to hear but were as powerful as waves one meter (three feet) away from a jet engine.
12 March 2018
Under Mexico, where the Cocos Plate from the Pacific Ocean slides under the North American Plate, a bending line of hills, created when the seafloor first formed, sits atop a flattened area of subduction. That newly recognized combination has created a fault that likely explains last September’s Puebla earthquake, scientists report in a new study.
8 February 2018
Scientists have used some of the world’s most powerful supercomputers to model ground shaking for a magnitude (M) 7.0 earthquake on the Hayward Fault and show more realistic motions than ever before.
14 December 2017
The frequency of flooding in the continental U.S. is increasing, and seasonality of floods is shifting, according to new research.
22 November 2017
Scientists have developed a computer simulation tool to predict short-term flood hazards on coral-reef-lined coasts and to assess longer-term impacts from climate change. The assessments will give input to estimate societal or economic risk and damage from such flooding.
24 October 2017
Seismic waves generated by tornadoes when they touch down could be used to measure a twister’s intensity, according to a new study that examined the May 2011 Joplin tornado. The findings could open the door to devising more accurate methods to study tornadoes from the ground.
7 September 2017
A growing number of wildfire-burned areas throughout the western United States are expected to increase soil erosion rates within watersheds, causing more sediment to be present in downstream rivers and reservoirs, according to a new study.