What are three volcanic areas in California?
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Mt Shasta, Mt Lassen, Mammoth Mountain
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Los Angeles and San Francisco would be the big ones but there are a lot of smaller ones in the same danger area. Basically anything that is on or near the San Andreas Fault. Check the map at the link--- actually explore the rest of the site, too--- good info there!
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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.
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The Kern River & Wilderness Areas\n\nSierra Rock Climbing School in Bishop, CA\n\nTahquitz Rock in the San Jacinto mountains
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A volcano is a geological landform usually generated by the eruption through a planet's surface of magma, molten rock welling up from the planet's interior. Other forms of volcano include ice volcanoes (particularly on some moons of Jupiter, Saturn and Neptune) and mud volcanoes. On Earth, volcanoes tend to occur near the boundaries of crustal plates. Important exceptions exist in hotspot volcanoes, which occur at locations far from plate boundaries; hotspot volcanoes are also found elsewhere in the solar system, especially on its rocky planets and moons.\n \nSmoking Bromo and Semeru (background) volcanoes on Java in Indonesia.\n\nMud volcanoes are formations often not associated with known magmatic activity. Active mud volcanoes tend to involve temperatures much lower than those of igneous volcanoes, except when a mud volcano is actually a vent of an igneous volcano.\n\nThe name "volcano" is thought to derive from Vulcano, a volcanic island in the Aeolian Islands of Italy whose name in turn originates from Vulcan, the name of a god of fire in Roman mythology. The study of volcanoes is called volcanology (sometimes spelled vulcanology).\nContents [hide]\n1 Volcano classification \n1.1 Erupted material\n1.2 Shape \n1.2.1 Shield volcanoes\n1.2.2 Cinder cones\n1.2.3 Stratovolcanoes\n1.2.4 Supervolcanoes\n1.2.5 Submarine volcanoes\n1.3 Subglacial volcanoes\n1.4 Classifying volcanic activity\n2 Notable volcanoes \n2.1 Volcanoes on Earth\n2.2 Volcanoes elsewhere in the solar system\n3 Volcanology \n3.1 Volcano formation \n3.1.1 Tectonic environments of volcanoes \n3.1.1.1 Constructive plate margins\n3.1.1.2 Destructive plate margins\n3.1.1.3 Hotspots\n4 Predicting volcanic eruptions \n4.1 Seismicity\n4.2 Gas emissions\n4.3 Ground deformation\n4.4 Iceberg tremors\n4.5 Hydrology\n4.6 Remote Sensing \n4.6.1 Local Predictions\n4.6.2 Early Warning for Lahars\n4.7 Predicting future eruptions of Mt. Etna\n4.8 Monitoring of Sakurajima, Japan\n5 Effects of volcanoes\n6 Past beliefs\n7 See also \n7.1 Lists\n7.2 Types\n7.3 Specific locations\n7.4 Volcano-related phenomena\n7.5 General topics\n7.6 People\n8 References\n9 Further reading\n10 External links\n\n[edit]\n\nVolcano classification\n[edit]\n\nErupted material\n\nOne way of classifying volcanoes is by the type of material erupted (ejecta), since this affects the shape of the volcano. If the erupted magma contains a high percentage (>65%) of silica, the lava is called felsic. Felsic lavas tend to be highly viscous (not very fluid) and are erupted as domes or short, stubby flows. Viscous lavas tend to form stratovolcanoes or lava domes. Lassen Peak in California is an example of a volcano formed from felsic lava and is actually a large lava dome. This type of volcano has a tendency to explode when erupting, because the viscous lava traps volatiles (gases), which cannot escape easily. Mount Pelée on the island of Martinique is another example. Pyroclastic flows (ignimbrite) are highly hazardous products of such volcanoes, since they are composed of molten volcanic ash too heavy to go up into the atmosphere, so they hug the volcano's slopes and travel far from their vents during large eruptions. Temperatures as high as 1,200 °C are known to occur in pyroclastic flows, which will incinerate everything flammable in their path and thick layers of hot pyroclastic flow deposits can be laid down, often up to many meters thick. Alaska's Valley of Ten Thousand Smokes, formed by the eruption of Novarupta near Katmai in 1912, is an example of a thick pyroclastic flow or ignimbrite deposit.\n\nIf, on the other hand, the magma contains a relatively low percentage of silica, the lava is called mafic or basaltic and will be fluid as it erupts, capable of flowing for long distances. Mafic refers to the chemical composition of the lava—it contains higher percentages of magnesium (Mg) and iron (Fe), and correspondingly lower percentages of silica. Due to its low viscosity, v
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Different kinds of volcanos.. Shield, cone etc.\nJust the way the lavva flows out and the ash spits up./
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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.
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You can find the general or exact locations on this site:\n\nhttp://www.volcano.si.edu/world/\n\nIt takes just that little bit of work to find them... and if it doesn't work, type every keyword you know into Google.
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California, Los Angeles
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Heres a few places to start with;\nhttp://www.volcanolive.com/mehetia.html\nhttp://www.swvrc.org/cerupt.htm\nhttp://volcano.und.nodak.edu/vwdocs/volc_images/Mehetia.html
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California has everything.  From the snow-capped peaks of Tahoe to the stunningly beautiful beaches of Malibu to the Mojave desert to the Redwood forests.  It's unbelievable and so varied.  Definitely California.
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STATE & NUMBER OF\nACTIVE VOLCANOES\nWashington 7\nOregon 20\nCalifornia 19\nIdaho 4\nNevada 1\nWyoming 1\nUtah 4\nArizona 2\nNew Mexico 3\nColorado 1\nAlaska 90\nHawaii 10
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Texas and Californina I think
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Composite volcanoes/ strato volcanoe.\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\n\n**Here is a personal tip my teacher taught us..depending on the plate it's sitting on and the boundary you will know how the plates strike and collide ...in the case of helen think of yr two hands being forced together straight on max pressure eventually your fingers begin to cave and slide up ward together... it looks olmost pointy and cone shaped right? just like St. Helen... This is assuming you know about plates and faults ....Hopefully you do..if bot disregard..
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The short answer is plate tectonics. Volcanoes can be divided into three major groups, those that are connected to a spreading center, like the mid-ocean ridges, those connected to a subduction zone, like Mt.St. Helens, or much of the Indonesian archipelago, and intraplate volcanism like Yellowstone. \n\nWhere the lithosphere (or crust) overlies an area within the asthenosphere (the layer of the earth under the crust) there are currents rising that cause volcanoes to form. These areas are called spreading centers. At the edges of the oceanic plates the plates often are forced under continental or even other oceanic plates. Where these plates are being forced downward, called subduction, there are volcanoes formed by melting magma rising from the descending plate. Most of the volcanoes around the edges of the Pacific Ocean are of this type, and are the reason it is called the "ring of fire".\n\nThe other group of volcanoes are related to what are called hot spots. These are places under the crust where the asthenosphere is especially hot. Yellowstone, and the Hawaiian Islands are examples of this. The hot spot under Hawaii is stationary, and as the Pacific plate has moved across it, it has produced a long chain of volcanic islands. \n\nYou can explore what makes volcanoes work at the following website sponsored by NASA:\nhttp://www.geology.sdsu.edu/how_volcanoes_work/Home.html
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I found a different website that talks about all the different types of volcanos.  There  are Shield volcanoes, Strato, Rhyolite caldera, Monogenetic fields, Flood basalts and Mid-ocean ridges.  There was also some interesting volcano facts that you might be able to use at the 2nd website below.
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around the ring of fire, which is around CA, AK, the west coast of south america, east and southeast asia.