Tuesday, July 09, 2013

Mexico Volcano Spews Ash 2 Miles High

One of the world's most active volcanoes, Mexico's Popocatepetl volcano, has come to life, spewing ash, gas, and steam (as seen from the village of Santiago Xalitzintla on July 4).

Just 50 miles (80 kilometers) east of Mexico City, the volcano has spit out a cloud of ash and vapor 2 miles (3.2 kilometers) high.
The volcano has been exploding for several days, causing Mexico's National Center for Disaster Prevention to elevate their national alert rating to Yellow Phase 3. A yellow alert signals that the volcano has demonstrated medium-to-high levels of activity. The next and final step would be a red alert, which would require the evacuation of nearby residents.

Al Jazeera reported that international airlines have cancelled flights in and out of Mexico City, stranding hundreds of people over the weekend. Read More

Massive earthquakes can make volcanoes sink The biggest earthquakes also move mountains.
The massive earthquakes that struck Japan and Chile in 2011 and 2010, respectively, sank several big volcanoes by up to 6 inches (15 centimeters), two new studies report.
This is the first time scientists have seen a string of volcanoes drop after an earthquake. Even though the mountains are on opposite sides of the Pacific Ocean, their descents look remarkably similar. The two teams have different explanations for why the volcanoes sank, according to the studies, published Sunday in the journal Nature Geoscience. However, both groups agree it's likely scientists will discover more examples of drooping volcanoes after big earthquakes, and find a single mechanism that controls the process. Read More