An online map of faults that includes California can be found in the Faults section of the Earthquake Hazards Program website.
Some may be curious of the U.S. fault lines with earthquakes in the news lately. Tap/click on "gear icon" for options and settings. These are our most popular maps, but there are many, many more in various publications.Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System). Earthquakes in this region directly affect a range of states including Illinois, Missouri, Tennessee, Indiana, etc. Also, generalized fault data used in the hazard maps.Earthquake scenarios describe the expected ground motions and effects of specific hypothetical large earthquakes.
This fault map of Nevada shows the seismic potential of the state. When the last quake struck the Hayward Fault in 1868, the Bay Area was sparsely populated. Geological and seismological studies show that earthquakes are likely to happen in any of several active zones in Idaho and adjacent states. By the time Lewis and Clark arrived on the West Coast in 1805, it had been 105 years since the Cascadia Subduction Zone last ruptured, sending a large portion of the Pacific Ocean roaring toward the coast.
Clicking the options icon in the top right corner lets you change which earthquakes are displayed, and many other map and list options. The New Madrid Seismic Zone (/ ˈ m æ d r ɪ d /), sometimes called the New Madrid Fault Line, is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the southern and midwestern United States, stretching to the southwest from New Madrid, Missouri.. On March 31, 2020 the Stanley earthquake (M6.5) occurred approximately 19 miles northwest of Stanley, Idaho. A Point of Comparison. Information available includes the age of the most recent activity on each fault segment, surface rupture areas, and whether or not the faults are visible at the surface.
[This site uses Akismet to reduce spam. San Francisco, Sacramento and the Sierra Nevada are on the North American Plate.While San Andreas does not go through San Francisco, it crosses Desert Hot Springs, San Bernardino, Wrightwood, Palmdale, Gorman, Frazier Park, Daly City, Point Reyes Station and Bodega Bay, (or just a few other million people). Many tribes even left the region permanently.However, it wasn’t until the discovery of the Cascadia Fault in the 1960s that modern settlers truly understood the dangers they faced.Running 680 miles along the Pacific Northwest coastline, the Cascadia Fault directly threatens 3 major metropolitan areas: Portland, Seattle, and Vancouver.With Cascadia capable of producing a magnitude 9.0 earthquake, the Pacific Northwest may soon face shaking 16 times more powerful than San Francisco’s devastating 1906 earthquake, lasting 4 minutes and delivering a mighty tsunami of unimaginable proportions.It’s not just the West Coast that needs to watch out for tectonic obliteration.Between 1811 and 1812, this zone experienced some of the largest quakes in history.And although they originated in the Mississippi Valley, they rang church bells in Boston and shook New York City — over 1,000 miles away!Even then-President James Madison and his wife Dolley reportedly felt shaking at the White House.After one particularly large rupture in the fault, the mighty Mississippi River was forced to run backward for several hours, devastating acres of forest and creating 2 temporary waterfalls.Fortunately the Mississippi Valley was sparsely populated back then. San Diego, Los Angeles and Big Sur are on the Pacific Plate. By the time Lewis and Clark arrived on the West Coast in 1805, it had been 105 years since The few remaining Native Americans in the area spoke of the earth shaking and ocean rising to consume the land. Map via USGS.
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