volcanoes in north america?
111578
Start with Mount St. Helens
890167
volcanoes and earthquakes (faults)
20175
Geologists classify volcanoes in following ways:\n\nCinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. Most cinder cones have a bowl-shaped crater at the summit and rarely rise more than a thousand feet or so above their surroundings. Cinder cones are numerous in western North America as well as throughout other volcanic terrains of the world.\n\nSome of the Earth's grandest mountains are composite volcanoes--sometimes called stratovolcanoes. They are typically steep-sided, symmetrical cones of large dimension built of alternating layers of lava flows, volcanic ash, cinders, blocks, and bombs and may rise as much as 8,000 feet above their bases. Some of the most conspicuous and beautiful mountains in the world are composite volcanoes, including Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mount Shasta in California, Mount Hood in Oregon, and Mount St. Helens and Mount Rainier in Washington.\n\nShield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield. They are built up slowly by the accretion of thousands of highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as thin, gently dipping sheets. Lavas also commonly erupt from vents along fractures (rift zones) that develop on the flanks of the cone. Some of the largest volcanoes in the world are shield volcanoes. In northern California and Oregon, many shield volcanoes have diameters of 3 or 4 miles and heights of 1,500 to 2,000 feet. The Hawaiian Islands are composed of linear chains of these volcanoes including Kilauea and Mauna Loa on the island of Hawaii-- two of the world's most active volcanoes.\n\nVolcanic or lava domes are formed by relatively small, bulbous masses of lava too viscous to flow any great distance; consequently, on extrusion, the lava piles over and around its vent. A dome grows largely by expansion from within. As it grows its outer surface cools and hardens, then shatters, spilling loose fragments down its sides. Some domes form craggy knobs or spines over the volcanic vent, whereas others form short, steep-sided lava flows known as "coulees." Volcanic domes commonly occur within the craters or on the flanks of large composite volcanoes. The nearly circular Novarupta Dome that formed during the 1912 eruption of Katmai Volcano, Alaska, measures 800 feet across and 200 feet high.
1049359
There are explosions in and on the surface of the sun, but as for volcanoes like here on earth no there are none. Since the surface of the sun is molten (which means not solid) there are no mountains on the sun.
793416
Well...\n\nhttp://volcano.und.edu/\nhttp://www.volcanoes.com/\nhttp://volcanoes.usgs.gov/\nhttp://vulcan.wr.usgs.gov/Volcanoes/\nhttp://pubs.usgs.gov/gip/volc/text.html\nhttp://en.wikipedia.org/wiki/Volcano\nhttp://www.usgs.gov/hazards/volcanoes/\nhttp://www.volcano.si.edu/world/\nhttp://www.cdli.ca/CITE/volcano.htm\n\nOkay, some of these rotate around grouped sites where many sites join together, but other than the USGS sites, I think most of these are individual... I haven't checked on them in a while, so yeah.
163505
aqua,fuego,ategenago are the 3 famous volcanoes. guatemala has 33 volcanoes.
387957
Volcanic activity can be classified as \na)active b)intermittent c)dormant or d)extinct. \n\nActive volcanoes erupt constantly. The eruption is generally quiet,but occasionally becomes violent. A famous active volcano is Stromboli,which lies on an island off the coast of Italy.\n\nIntermittent volcanoes erupt at fairly regular periods. Such volcanoes include Mount Asama in Japan, Mount Etna in Sicily, and Hawaii's Hualalai.\n\nDormant volcanoes have become inactive, but not long enough to know whether they will erupt again. Such 'sleeping' volcanoes include Lassen Peak in California and Paricutin in Mexico.\n\nExtinct volcanoes have been inactive since the beginning of recorded history. Aconcagua in Argentina and Mount Kenya in Kenya are extinct volcanoes. They propably will not erupt again.
1078990
Go to www.usgs.gov.  It's a great site that gives you all sorts of information about earthquaktes, faultlines, etc. I'm not sure if you can view all of North America, but as there are so many faultlines, it may be best to view it in smaller areas.  Good luck and enjoy exploring!
442324
Quite a few more than just two --\nAmboy\nLassen\nMalapi Hill\nPisgah\nUbehebe\nCima\nLong Valley\nMono-Inyo\nShasta\n\nhttp://volcano.und.nodak.edu/vwdocs/volc_images/north_america/california/california.html
614669
Well, the page linked below lists many of them, but you need to decide what you will count as volcanoes. You take for example Kilauea. Kilauea has erupted from several different craters in the last hundred years, including Halemaumau, Kilauea Iki, and most recently, Puu Oo. Those are a few miles apart. Is each crater a separate volcano?\n\nThe link takes you to a list that is mostly comprised of large shield volcanoes. The island of Hawaii is made of several of those, Maui's got two, Molokai's got three, and the island of Lanai is made of just one. Many of those shield volcanoes have smaller volcanoes on them. \n\nMany of the shield volcanoes like Mauna Kea or Haleakala  have cinder cones on them. I pass two or three on the way to work every day. Are you counting cinder cones? There may not have been a definitive census ever done of those on Hawaiian volcanoes. Diamond Head or Leahi on Oahu is a tuff ring. It was once probably a cinder cone, but do you count tuff rings? Is Diamond Head one of the 40 Honolulu vents mentioned on the page below under Oahu? I don't even know.\n\nDo you count underwater volcanoes? How about the Emperor Seamounts, which were probably formed by the Hawaiian Hot Spot, but which are underwater and stretch all the way north to Alaska?\n\nYour question seems like a simple one that should have a straightforward answer, but it's really not.
226261
False.\nHere is a list of the 34 volcanoes in the Atlantic ocean basin:\nhttp://www.volcano.si.edu/world/list.cfm\n\nYou will see that most of them are in the Azores, the Canary Islands, Ascension Island in the central Atlantic,  or the Cape Verde Islands, or are submarine. They do not really encircle the Atlantic. In the south Atlantic there is a small arc of volcanic islands known as the Sandwich Islands, and in the north Atlantic there is Iceland, which is part of the Mid-Atlantic Ridge. \nhttp://volcano.und.nodak.edu/vwdocs/volc_images/south_america/south_sandwich_islands.html\n\n\nAnother group of volcanoes forms the chain of islands know as the West Indies. Many of these are quite active. Soufriere Hills on Montserrat is currently erupting. \nhttp://www.volcano.si.edu/reports/usgs/#soufhill\n\nHere is a place you can see maps of volcanoes by region:\nhttp://volcano.und.nodak.edu/vwdocs/volc_images/volc_images.html
216932
http://en.wikipedia.org/wiki/Volcanos
867639
See for yourself:\n\nhttp://www.solcomhouse.com/volcano.htm\nhttp://volcano.und.edu/vwdocs/frequent_questions/group10_new.html\nhttp://www.exn.ca/volcanoes/causes.cfm\nhttp://vulcan.wr.usgs.gov/Outreach/AboutVolcanoes/where_do_volcanoes_occur.html\nhttp://library.thinkquest.org/10136/volcano/volctq.htm\nhttp://en.wikipedia.org/wiki/Volcano\n\nMore random links I keep at hand for God knows what uses.
487744
We do not know. Future volcanic eruptions could occur within or near Yellowstone National Park for the simple reason that the area has a long volcanic history and because there is hot and molten rock, or magma, beneath the caldera now. Yellowstone is monitored for signs of volcanic activity by YVO scientists who detect earthquakes using seismographs and ground motion using GPS (Global Positioning System). YVO has not detected signs of activity that suggest an eruption is imminent.\n\nThe crust of North America continuously moves southwest over the Yellowstone hotspot as the Earth's crust stretches above it, promoting the ascent of heat and molten rock. These processes produce basaltic magmas within the Earth's mantle, which rise into the overlying crust and continue to heat the rocks beneath Yellowstone, maintaining and possibly adding to the rhyolite magma in the crust above.\n\nYellowstone's 2-million-year history of volcanism, the copious amount of heat that still flows from the ground, the frequent earthquakes, and the repeated uplift and subsidence of the caldera floor also testify to the continuity of magmatic processes beneath Yellowstone and point to the possibility of future volcanism and earthquake activity.
24742
There are volcanoes because of the interaction between multiple plate boundaries which causes the magma in the upper mantle (from beneath the crustal lithosphere) to rise, erupt and form lava at the surface.  \n\nVolcanoes tend to occur at either subduction zones, rifts or at hot spots.  Subduction zones are located at convergent oceanic/oceanic or oceanic/continental plate boundaries, where the denser oceanic crust sinks into the mantle beneath the other plate.  The minerals in the subducted slab dehydrates through metamorphic processes, which releases fluids to the mantle wedge to produce the melt (magma), which erupts to form volcanoes.  \n\nFor rifts, during the early stages of continental rifting (where continents are pulled apart because of extensional forces), volcanic activity can occur because crustal extension can allow magma to rise and intrude further up the crust.  Therefore, volcanic activity can occur in such situations.  eg: East African Rift. \n\nIn mid oceanic ridges, the divergent motion of oceanic plates allows mantle material to rise from below.  This tends to form a submarine ridge rather than a volcano.\n\nHowever, volcanoes can occur within the plate.  These are usually called hotspots, where a plume (a plume of anomalously hot magma) rise from deep within the mantle (probably as deep as the core-mantle boundary) to the surface.  These are stationary and therefore, it can leave a trail of volcanoes as the lithospheric plates move over the mantle.  Eg: Hawaii-Emperor seamount chain.
755153
start from here:http://en.wikipedia.org/wiki/Volcano\nthan click here:\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBUXpXNyoA;_ylu=X3oDMTE2ZGhvZmh2BGNvbG8DZQRsA1dTMQRwb3MDMQRzZWMDc3IEdnRpZANERlg1XzMw/SIG=19tfhms70/EXP=1163277749/**http%3a//rdre1.yahoo.com/click%3fu=http%3a//www.volcanolive.com/%26y=04D6D45EA8332C5A9E%26i=680%26c=21908%26q=02%255ESSHPM%255BL7sviz%253Fips%257C%7eqpzl6%26e=utf-8%26r=0%26d=wow%7eDFX5-en-us%26n=0IHKK1KQNHA4BU6E%26s=12%26t=%26m=4554E436%26o=01C888B21CE6710E36%26x=052DFE91D28B9E0A83349375261B2BB2A1\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBXHpXNyoA;_ylu=X3oDMTE2aXBvZDkwBGNvbG8DZQRsA1dTMQRwb3MDMwRzZWMDc3IEdnRpZANERlg1XzMw/SIG=12fj2lehe/EXP=1163277749/**http%3a//www.geo.mtu.edu/volcanoes/west.indies/soufriere/govt\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBaXpXNyoA;_ylu=X3oDMTE2bTQybGs2BGNvbG8DZQRsA1dTMQRwb3MDNQRzZWMDc3IEdnRpZANERlg1XzMw/SIG=13154364e/EXP=1163277749/**http%3a//interactive2.usgs.gov/learningweb/explorer/topic_hazards_volcanoes.asp\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBV3pXNyoA;_ylu=X3oDMTE2MWFla2V2BGNvbG8DZQRsA1dTMQRwb3MDMgRzZWMDc3IEdnRpZANERlg1XzMw/SIG=1aaavi8gn/EXP=1163277749/**http%3a//rdre1.yahoo.com/click%3fu=http%3a//www.volcanolive.com/contents.html%26y=04BF5322B24FA45313%26i=680%26c=15685%26q=02%255ESSHPM%255BL7sviz%253Fips%257C%7eqpzl6%26e=utf-8%26r=1%26d=wow%7eDFX5-en-us%26n=0IHKK1KQNHA4BU6E%26s=12%26t=%26m=4554E436%26o=018610364A2BA0082E%26x=05679277237FEB7DFC07236F0AED3006C9
950107
Ah... something called a caldera forms.\n\nhttp://vulcan.wr.usgs.gov/Glossary/Caldera/description_caldera.html\nhttp://en.wikipedia.org/wiki/Caldera\nhttp://www.agu.org/pubs/crossref/2003/2003GL018380.shtml\nhttp://hvo.wr.usgs.gov/volcanowatch/1996/96_04_26.html\nhttp://www.yellowstonenationalpark.com/calderas.htm\nhttp://www.mvo.ms/glossary.htm\n\nGosh, if these don't help... I don't know what will.