There are about 169 volcanoes in the United States that scientists consider active (source). Most of these are located in Alaska, where eruptions occur virtually every year. Others are located throughout the West and in Hawaii (Ring of Fire anyone?).
There are several ways we minimize the danger of volcanic activity (apart from the obvious of ‘getting out of the way’…(:
· Forecasting (earthquakes as early warnings -although in 2014 a Japanese volcano erupted without any previous seismicity (livescience article), land swelling before eruption, gas emissions, etc.)
· Volcanic Alert Codes (USGS): the levels of alert and the aviation code levels commonly change at the same time (chart on right). A non-erupting volcano will have a green icon, and a red one indicates an imminent eruption (see USGS Alert Codes).
Today the US hazards map (below) shows six (6) volcanoes as to be above normal background (elevated unrest); map below:
Kilauea, Shishaldin, Ahyi Seamount, Kanaga and Gareloi. Alert Level=ADVISORY. Aviation Color Code = Yellow.
Great Sitkin Alert Level=WATCH. Aviation Color Code = Orange.
Interesting blog this week! I have actually visited Mount St. Helens, which is an active volcano on the West coast of USA.
ReplyDeleteHello Ana "Many people in Canada are unknowing that western Canada lies along the Pacific "Ring of Fire" active.
ReplyDeleteVolcanic in actuality, there have been, at the minimum, 49 volcanoes active in British Columbia. And Yukon Territory. In the last 10,000 years, these Volcanoes are still alive and could be active. They also use natural resources. They also use Cnadian National, Seismograph network." This is what I put in my blog I see that. I see that we both posted pics. I see that you have " There are about 169 volcanoes in the United States that scientists consider active " I have "
Volcanic in actuality, there have been, at the minimum, 49 volcanoes "