Taxonomy term

february 2013

Where on Earth? - February 2013

Clues for February 2013:
1. Formed over the last 2,500 years, this 900-meter-tall stratovolcano is the youngest eruptive vent in a larger volcanic complex roughly 275,000 years old. Although it is the most historically active volcano in its host country, it has been quiet since 1975, when it ejected about 2 million cubic meters of ash, tephra and volcanic blocks in several hours.

Drinking toilet water: The science (and psychology) of wastewater recycling

Would you drink water that came from a toilet? The imagery isn’t appealing. Even knowing that the water, once treated, may be cleaner than what comes out of most faucets, many people are disgusted by the idea. But in places like Singapore and Namibia, limited supplies of freshwater are being augmented by adding highly treated wastewater to their drinking water. As climate change and population growth strain freshwater resources, such strategies are likely to become more common around the world, and in the United States.

28 Jan 2013

The dangers of solar storms: That which gives power can also take it away

Were a massive solar storm to strike Earth, the impacts could rival or exceed the worst natural disasters humans have ever faced. In last month’s issue of EARTH, we explored what is known about solar activity, the sun and its interaction with Earth. This month, we examine the possible effects of solar activity and the vulnerability of power grids and satellites, as well as what is being done to reduce that vulnerability.

21 Jan 2013

How strong was the Carrington Event?

NASA has described the magnetic field of the coronal mass ejection (CME) associated with the 1859 Carrington Event, the largest solar storm ever detected, as “extremely intense” relative to other CMEs. The amount of plasma it ejected is difficult to estimate, but more important in determining its strength is how fast it arrived.

21 Jan 2013

Two NASA spacecraft reveal ancient underground cracks from moon's formation

SAN FRANCISCO: The face of the moon has always enchanted humankind, but new data from a NASA mission have given scientists a glimpse of what lies beneath the surface.

06 Dec 2012