History. 1  A soldier carries an early example (1945) of mobile synchronous radio communication. 2  A basic chat box allows quick communication, but with too many people can be frustrating. 3  All those red flags are messages I've ignored, a pitfall of asynchronous communication.
Earth's Largest Volcano-Mauna Loa,Hawaii. The largest volcano in the world is Mauna Loa on the island of Hawaii. There have been references to Yellowstone as the largest volcanic system in North America, but most, if not all, scientific organizations recognize Mauna Loa as the largest single volcano.
Mount St. Helens is an active stratovolcano/composite cone volcano It is a crater volcano. Facts about Mount St. Helens During the morning of May 18, 1980, Mount St. Helens erupted, creating the most economically destructive volcanic event ever in the United States.