https://www.earthmagazine.org/tags/infrasound/ Recent content in Infrasound on EARTH Magazine Hugo en-US American Geosciences Institute. All rights reserved. Thu, 21 Aug 2014 18:58:48 -0400 https://www.earthmagazine.org/article/infrasound-reveals-lava-lake-levels/ Thu, 21 Aug 2014 18:58:48 -0400 https://www.earthmagazine.org/article/infrasound-reveals-lava-lake-levels/ <figure class="earth-figure"> <img src="https://www.americangeosciences.org/static/earth/infrasound-reveals-lava-lake-levels/nighttime_villarrica_promo.jpg" alt="Only rarely can scientists get a view of the lava lake atop Villarrica volcano. Credit: Greg Waite." loading="eager" decoding="async"> <figcaption>Only rarely can scientists get a view of the lava lake atop Villarrica volcano. Credit: Greg Waite.</figcaption> </figure> <p>The rises and falls of volcanic lava lakes are not easily tracked, especially when the lakes aren&rsquo;t visible from crater rims. But recently, researchers found a way to monitor the lava lake at Chile&rsquo;s Villarrica volcano using complementary methods to keep an eye on a feature they can&rsquo;t always see.</p> https://www.earthmagazine.org/article/alaskan-volcano-doesnt-just-huff-and-puff-it-screams/ Tue, 16 Jul 2013 12:50:55 -0400 https://www.earthmagazine.org/article/alaskan-volcano-doesnt-just-huff-and-puff-it-screams/ <p>In March 2009, Alaska&rsquo;s <a href="http://www.avo.alaska.edu/volcanoes/volcinfo.php?volcname=redoubt">Mount Redoubt</a> awoke from two decades of silence with something to say: A series of small earthquakes leading up to the eruption produced a seismic sound that staff at the <a href="http://www.avo.alaska.edu/">U.S. Geological Survey's Alaska Volcano Observatory</a> nicknamed &ldquo;the screams.&rdquo; Now, two new studies are eavesdropping on Redoubt&rsquo;s inner workings and quantifying the forces needed to produce the unusual harmonic tremors.</p>