Geological Data Suggest Greek Region Is Vulnerable To Tsunami Events
Date: 20.4.2012 11:27 | ArkNow favorites
A tsunami is usually thought to be one giant wave. In actuality, it is a series of water waves, each bigger than the previous one. It is caused by the displacement of a large volume of a body of water, typically an ocean or a large lake.
Where Do the Highest-Energy Cosmic Rays Come From?
Date: 20.4.2012 11:21 | ArkNow favorites
Some rare cosmic rays pack an astonishing wallop, with energies prodigiously greater than particles in human-made accelerators like the Large Hadron Collider. Their sources are unknown, although scientists favor active galacti nuclei or gamma-ray bursts.
Mexico Raises Volcano Alert Level After Rumbling
Date: 20.4.2012 10:54 | ArkNow favorites
MEXICO CITY – Authorities in Mexico have raised the alert level for the Popocatepetl volcano southeast of Mexico City due to increasing activity. It's now at the fifth step on a seven-level warning scale.