Screenshot of Past 7 Days, M1+ Earthquakes, Colored by Age At What Age Can You Have Your First Alcoholic Drink? What countries produce the most vehicles? What are the Top Ten Countries with Highest Exports? 2015 PHIVOLCS West Valley Fault Line Google Map - Google My Maps Valley Fault System (VFS) in the Philippines, is a dominantly dextral strike-slip fault system that extends from. Strike-slip faultsoccur where rocks are sliding past each other horizontally, with little to no vertical movement. She worked as a reporter at the Engineering and Technology magazine, freelanced for a range of publications including Live Science, Space.com, Professional Engineering, Via Satellite and Space News and served as a maternity cover science editor at the European Space Agency. These faults are commonly found in collisions zones, where tectonic plates push up mountain ranges such as the Himalayas and the Rocky Mountains. The second crack, 80 miles long (125 km), opened during the second, somewhat milder 7.5-magnitude temblor about nine hours later, COMET said in a tweet on Friday (Feb. 10). (2021), Shapefile for slip tendency and dilation tendency calculated for Quaternary faults in the Great Basin, Geology, Minerals, Energy, and Geophysics Science Center, Data Release for Luminescence: Mid to Late Quaternary Geomorphic and Paleoseismic Event History, Cheraw Fault, Colorado, Geosciences and Environmental Change Science Center, 2020 Update to the Quaternary Fault and Fold Database for Washington State, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Quaternary Fault and Fold Database for the Nation, Data for Quaternary faults, liquefaction features, and possible tectonic features in the Central and Eastern United States, east of the Rocky Mountain Front, Probabilistic seismic hazard assessment for the state of California, National Seismic-Hazard Maps: Documentation June 1996, Preliminary map showing known and suspected active faults in Idaho, Quaternary fault map of the Basin and Range and Rio Grande Rift provinces, Western United States, Preliminary map showing known and suspected active faults in Wyoming, Maps of major active faults, Western Hemisphere, International Lithosphere Program (ILP), Project II-2; guidelines for U.S. database and map, June 1993, Preliminary map showing known and suspected active faults in Colorado, Preliminary map showing known and suspected active faults in western Montana. Like all of California, this is earthquake country! The tear, which continues to grow, caused part of the. Open full screen to view more. At the time the Quaternary Fault and Fold database was established (1993), the Quaternary time period was defined as <1.6 Myr in the1983 Geologic Time Scale, published in 1983. In 1884, Brooklyn was rattled by an earthquake originating near the Ramapo Fault System. By clicking Accept, you consent to the use of ALL the cookies. What are the Top Ten Countries with Most Reliance on Nuclear Power? What Countries have a Cross on their National Flag? We present geomorphic analyses, geochronology, and paleoseismic trenching data to 1) document the rupture history of the ~45-km-long southwestern section of the Cheraw fault ove, This release is an update to the online "Quaternary fault and fold database" for Washington State. Since the earthquakes struck, satellites operated by governmental agencies as well as private companies have been assessing the damage. For the hazard maps, both the fault surface trace and the metadata are simplified representations of the geometry and behavior of the fault, based on geologic interpretation. What are the top 10 largest deserts in the world? This numeric identifier allows us to clearly cite multiple-same year publications for authors. The crack was created by the first of the two major tremors that hit the region on Monday, the more powerful 7.8-magnitude earthquake that struck at 4:17 a.m. local time (8:17 p.m. EST on Feb. 5). The earthquake produced surface rupture distributed across a 28-km-long zone along the eastward projection of the Candelaria fault in the Mina deflection of the central Walker Lane. Heres how it works. EARTHQUAKES IN DIVERS PLACES THE BIBLE SAYS USGS!. This feed adheres to the USGS Earthquakes The GIS data was engineered by Richard Dart and maintained by Jerry Mayer (USGS). This website uses cookies to improve your experience while you navigate through the website. Join our Space Forums to keep talking space on the latest missions, night sky and more! You can sort the data by time of most recent movement (4 inclusive categories) or slip rate (4 exclusive categories). The narrower the search; the quicker the results will be available. These cookies will be stored in your browser only with your consent. Alaska - Alaska Department of Natural Resources, California - California Geological Survey, Illinois - Illinois State Geological Survey, Montana - Montana Bureau of Mines and Geology, Nevada - Nevada Bureau of Mines and Geology, New Mexico - New Mexico Bureau of Mines and Mineral Resources. Interactive fault map and comprehensive geologically based information on known or suspected active faults and folds in the United States. Our definition of published literature includes typical sources (journals and maps), as well as M.S. Quaternary Faults ( B) Learn More Data source The two plates dont just meet at a single line, and the state is crisscrossed with dozens of earthquake faults. As such, when these. This database was used to create thefault-source characterizationin the National Seismic Hazard Maps. Earthquakes on faults like these may cause tsunamis in the Puget Sound region. theses and Ph.D. dissertations, governmental contract reports (which includes many NEHRP-sponsored studies), abstracts, and open-file (preliminary) reports. Geologic evidence demonstrates that the feature is not a tectonic fault or feature; this category includes features such as demonstrated joints or joint zones, landslides, erosional or fluvial scarps, or landforms resembling fault scarps, but of demonstrable non-tectonic origin. If you expect that your search will result in a large number of results (more than 40), you can reduce the amount of time to obtain those results by limiting the number of results on each page at the bottom of the search form. What are the countries with the most threatened species of fish? KNOWING JESUS LIGHT FOR THE DAY ODB.ORG AMEN. What are the Top Ten Tea Exporting countries? What countries have high death rates due to non-communicable diseases? *The 75% probability of one or more magnitude 7.0 earthquakes striking Southern California is based on a 30-year period, beginning in 2014. Earthquakes will disrupt services like electricity, water and sewer, and communication devices, and may limit access in and out of the region. How many people are internally displaced due to conflict and violence? You should turn off this feature prior to conducting searches that require entering characters or digits. This category only includes cookies that ensures basic functionalities and security features of the website. A lock () or https:// means youve safely connected to the .gov website. Check out the map below, and click on any fault for more information. What countries have largest warning signs on tobacco packages? In Kentucky, many homes are built on poor soil, increasing their risk. It spans parts of four generally northwest-trending tectono- stratigraphic terranes of the Klamath Mountains, the Eastern Hayfork, Western Hayfork, Rattlesnake Creek, and Western Jurassic terranes, as well as, in the southwest corner of the quad, 12201 Sunrise Valley Drive Reston, VA 20192, Surface Rupture Map of the 2020 M 6.5 Monte Cristo Range earthquake, Esmeralda and Mineral counties, Nevada, Stratigraphic and structural relations in trench exposures and geomorphology at the Big Burn, Lily Lake, and Lester Ranch sites, Bear River Fault Zone, Utah and Wyoming, Map of recently active traces of the Rodgers Creek Fault, Sonoma County, California, Map of landslides triggered by the January 12, 2010, Haiti earthquake, Seismic-hazard maps for the conterminous United States, 2014, Paleoseismology of a possible fault scarp in Wenas Valley, central Washington, Paleoseismology of a newly discovered scarp in the Yakima fold-and-thrust belt, Kittitas County, Washington, Seismic-Hazard Maps for the Conterminous United States, 2008, Reconnaissance geologic map of the Dubakella Mountain 15 quadrangle, Trinity, Shasta, and Tehama counties, California, Reconnaissance geologic map of the Dubakella Mountain 15 quadrangle, Trinity, Shasta, and Tehama Counties, California, Reconnaissance geologic map of the Hyampom 15' quadrangle, Trinity County, California. These map compilations, however, did not provide much supporting data. What are the Top Ten Steel Manufacturing Countries? Use the time slider, in the upper left hand corner of the map, to animate the series of earthquakes. Whats up with the 50 US nuclear bombs stored at the Incirlik Air Base in Turkey, right on the same fault line California hasnt seen a catastrophic earthquake recently. How Many Personnel Do Nations Contribute to the UN Peacekeeping Force? The estimated magnitude of this earthquake ranged from 7.0 to 7.9 with a surface wave magnitude of close to 8.5. A .gov website belongs to an official government organization in the United States. Many tribes even left the region permanently. What countries have Arabic as an Official, Co-official, and Minority Language? (Image credit: Lloyd Cluff via Getty Images). The San Andreas fault is a strike-slip fault. Already a CEA policyholder? This very unstable fault in California has been threatening the San Francisco Bay Area for generations. A mid-magnitude earthquake in the right place could cause devastating damage. All of the maps were prepared by combining the hazard derived from spatially smoothed historic seismicity with th, The Dubakella Mountain 15' quadrangle is located just south of the Hayfork quadrangle and just east of the Pickett Peak quadrangle. NY 10036. The fault and fold traces were digitized mainly by Richard Dart, with help from Dean Hancock*. Next. What countries have highest publications of scholarly articles? What are some of the world's most endangered species? Subsequent state-scale compilations, such as those byJohns and others, (1982),Stickney and Bartholemew (1987), andHecker (1993)provided some supporting database and were the first true fault compilations. Additional reporting by Traci Pedersen, Live Science contributor. Powerful earthquake swarm off Fiji and Tonga M6.0 and M6.6 quakes, 2nd major quake within 24 hours: Shallow M7.1 earthquake hits off Indonesias Sumatra island, triggering tsunami warning, At least 13 dead after powerful magnitude 6.5 earthquake rocks Afghanistan, Pakistan and India Very deep M6.5 earthquake hits Argentina, Strong M6.5 earthquake strikes Afghanistan Tremors felt in Pakistan and India, Powerful M6.8 earthquake hits Ecuador: At least 4 dead, widespread damage, building collapses Strong shaking felt in Peru, Terrifying video shows olive grove turned into a Gigantic Canyon after Turkeys earthquake split land in huge rifts. The deepest earthquakes occur on reverse faults at about 375 miles (600 km) below the surface. The additional geographic search options areAMS sheetandphysiographic province. This Banda Detachment fault represents a rip in the ocean floor that is exposed for more than 23,166 square miles (60,000 square km). Are There Countries with Multiple Capital Cities? There are three kinds of faults: strike-slip, normal and thrust (reverse) faults, said Nicholas van der Elst, a seismologist at Columbia University's Lamont-Doherty Earth Observatory in Palisades, New York. The Basin and Range Province in North America and the East African Rift Zone are two well-known regions where normal faults are spreading apart Earth's crust. Virtual Tour of the 1906 San Francisco Earthquake. Its not just the West Coast that needs to watch out for tectonic obliteration. In what countries people live the longest? Faults that fall outside the traditional definition of 'active' can still be capable of generating earthquakes. ONE failing is a fracture or zone of fractures between two blocks by rock. What are the Top Ten Silver Producing Countries? What are the top 10 iron ore producing nations? Bundled with the map and tour are: 1) photographs showing evidence of creep and other aspects of faulting, 2) locations of creep, 3) locations of exploratory . A map of the 2010 earthquake in Haiti shows dotted orange lines indicating fault lines. Please use the following format according to the USGS Publishing Standards (Memorandum No. TheQuick Searchform is very simple with only four search options available. Earthquake scenarios describe the expected ground motions and effects of specific hypothetical large earthquakes. Official websites use .gov The search capabilities described below will allow the user to sort the data on a variety of fields (geographic, structural, time of movement, slip rate, etc.). What countries have secure internet servers? Explore multiple Google Earth layers related to the geology and geologic hazards of the greater Bay Area. Even then-President James Madison and his wife Dolley reportedly felt shaking at the White House. Manage your policy. What countries is the Queen of England the Reigning Monarch? Hubble telescope eyes galactic site of distant star explosion (video), China's Zhurong Mars rover finds signs of recent water activity on Red Planet, SpaceX Falcon Heavy rocket aborts triple satellite launch at last minute. You have entered an incorrect email address! How Many Countries Use The Euro As Their Currency? ago Hello u/Busy_Bad8714! Also, generalized fault data used in the hazard maps. NY 10036. Many fault lines cut the ground's surface in New Zealand; each past fault movement would have been accompanied by a large earthquake. Surface rupture at Hassa Town. Its the most active earthquake zone east of the Rocky Mountains. Future US, Inc. Full 7th Floor, 130 West 42nd Street, What countries have won the Miss Universe titles? Sources/Usage: Public Domain. While this is a work in progress, we've got a lot of the world covered already. The northern San Andreas leveled San Francisco in 1906, but its been a lot longer since the southern part of the fault ruptured. Open the KML using Google Earth. What are the top 10 countries with solar power capacity? What countries face high risk of disasters? This data release contains machine-readable files accompanying the study Quaternary Reelfoot fault deformation in the Obion River valley, Tennessee, USA published by Delano et al. Download an animated USGS Earthquakes KML Feed. The earth is constantly moving because of which there is a continuous movement of the rocks. Faults may range in length from an few millimeters to thousands of kilometers. Follow Tereza Pultarova on Twitter @TerezaPultarova. The Cascadia Subduction Zone stretches underneath the Humboldt-Del Norte county region, extending from Cape Mendocino all the way up through the Pacific Northwest. Taking steps now will give you confidence that you and your family are prepared to stay safe. Geologic evidence demonstrates the existence of a fault or suggests Quaternary deformation, but either (1) the fault might not extend deeply enough to be a potential source of significant earthquakes, or (2) the currently available geologic evidence is too strong to confidently assign the feature to Class C but not strong enough to assign it to Class A. Geologic evidence is insufficient to demonstrate (1) the existence of tectonic fault, or (2) Quaternary slip or deformation associated with the feature. And if you have a news tip, correction or comment, let us know at: community@space.com. Earthquakes on shallow faults typically last 20 to 60 seconds and the shaking is localized to the general area of the fault. All of the maps were prepared by combining hazard derived from spatially- smoothed historic seismicity with hazard from fault-specific sources. The Advanced Search form allows queries on the above four parameters and on geographic options, paleoseismic characteristics, and structural characteristics. What countries are the winners of FIFA beach soccer World Cup? What are the countries with oil-based economies? All faults are related to the movement of Earth's tectonic plates. "Is Islamabad Ready for the Expected Earthquake? She earned a master's degree in geology from Caltech, a bachelor's degree from Washington State University, and a graduate certificate in science writing from the University of California, Santa Cruz. What are the Top Ten Winners of the Karate World Championships? What are the cities with the most billionaires? Normal faultscreate space. fault lines Exploring earthquake fault lines in Google Earth July 16, 2014 We've talked about Earthquakes quite a lot over the years, as Google Earth is a great tool for visualizing. The basic strategy in classifying the data has been to create a variety of bins (categories) to characterize these potential seismic sources in terms of their activity rates. Two blocks of crust pull apart, stretching the crust into a valley. What countries have better Health and Hygiene factor for Travelers? Google Earth File In this layer, the fault colors represent age of last movement on the fault, from 1.6 million years ago to the present. Here a video about the 1964 Alaskan earthquake, also known as the Great Alaskan earthquake and Good Friday earthquake, which occurred at 5:36 PM AST on Good Friday, March 27, 1964. These and numerous other faults are capable of, Like all of California, the Central Valleywhich is ringed by. What are the largest countries in the world by area? at a depth of 13 kilometers (km) approximately 25 km southwest of the capital, Port-au-Prince. If it is, grantswill belimited. TheAdvanced Searchform can be used to further limit the search results. In what countries are people still living in dark? There are three basic types of search fields: those with (1) pull-down menus, (2) text, and (3) numeric. What are the top 10 countries with the highest FDI? What are the cities with most cultural interaction? What are the Top 10 Busiest Airports in the world? The few remaining Native Americans in the area spoke of the earth shaking and ocean rising to consume the land. And although they originated in the Mississippi Valley, they rang church bells in Boston and shook New York City over 1,000 miles away! Related: Turkey earthquake devastation spotted by satellites (photos). When you use this data, please provide proper acknowledgment. The data release includes grain size analyses from three auger sites (TableS1_WilsonLoop_grainsize.txt, TableS2_Lanesferry_grainsize.txt, TableS3_BiggsFarm_grainsize.txt) and unit descriptions from t, This database contains the results of slip tendency and dilation tendency analysis of Quaternary faults in the Great Basin region, including parts of Arizona, California, Idaho, Nevada, Oregon, Utah, and Wyoming. Johns, W.M., Straw, W.T., Bergantino, R.N., Dresser, H.W., Hendrix, T.E., McClernan, H.G., Palmquist, J.C., and Schmidt, C.J., 1982, Neotectonic features of southern Montana east of 11230' west longitude: Montana Bureau of Mines and Geology Open-File Report 91, 79 p., 2 sheets. Space is part of Future US Inc, an international media group and leading digital publisher. New York, Most recently, in 2018 it was revised again to 2.58 Myr, seeGSA Geologic Time Scale. PRAYER FOR EVERYBODY TO READ ODBORG AND THE BIBLE THE OLDEST BOOK IN THE WORLD ABOUT THE BENINNING AND END OF THE WORLD. Fault line places in the Philippines. Is Secondary Vocational Education an attractive career option? In fact, in some areas, the amount of extension was so severe that there was no longer any trace of oceanic crust, according to New Atlas. What countries have the highest cases of anemia? When an earthquake occurs on one of these faults, the rock on one side of the fault slips with respect to the other. What countries have witnessed most environmental protests? "This earthquake fault is one of the longest on record on the continents. What countries are the top exporters of soft drinks? What countries have won Nobel Prize in Chemistry? Exploring earthquake fault lines in Google Earth July 16, 2014 We've talked about Earthquakes quite a lot over the years, as Google Earth is a great tool for visualizing those types of. In addition, we provide narrative comments that clarify, justify, or expound upon these parameters. What are the Top Ten Wine Producing countries? Lidar imagery of the Wenas Valley illuminated the west-northwest-trending, 2- to 8-meter-high scarp as it bisected alluvial fans developed at the mouths of canyons along the south side of Umtanum Ridge. These faults can - and have - contributed to major events, such as the 2016 magnitude 7.8 Kaikura earthquake. With Cascadia capable of producing a magnitude 9.0 earthquake, the Pacific Northwest may soon face shaking 16 times more powerful than San Franciscos devastating 1906 earthquake, lasting 4 minutes and delivering a mighty tsunami of unimaginable proportions. How Many Continents are there in the World? Quaternary faults, folds, and earthquake-induced liquefaction in order to develop an internally This broad research initiative resulted in new maps and studies of Quaternary faults. What are the cities with over 10 million residents? What are the top 20 water parks in the world? You will need to download and install Google Earth to view KML files. Below these depths, rocks are probably too warm for faults to generate enough friction to createearthquakes, van der Elst said. For instance, both the 2011 Tohoku earthquake and the 2004 Banda Aceh earthquake off Indonesia occurred due to rupture at thrust faults on subduction zones. The fault has to break. What countries have male population with high blood pressure? The Monday earthquakes, however, stood out with their ferocity and devastating effects, according to experts. Global Gender Gap Report- How equal is the world for women? It is mandatory to procure user consent prior to running these cookies on your website. What countries have the best education systems? How do nations rank on the Ecological Footprint per capita index? Left or right, why is our drive not universal? Secure .gov websites use HTTPS To start the tour, download and open the "Hayward Fault Map and Tour" file in Google Earth (free download), then click the "Play Tour" button located at the bottom of the "Places" panel. Then, a series of STF features are extracted and input into two random forest classifiers 28 to implicitly map from these features to the corresponding depth labels: one to discriminate shallow and. The movement of the tectonic plates that caused the earthquakes was such that the cracks are clearly visible on the surface, running through towns and in some cases directly through buildings. It generally follows the coast, just offshore. Skip to Main Content. You can also learn how urbanization has changed the Bay Area landscape since 1868. Local scientists shared photographs of the surface cracks on Twitter (opens in new tab), confirming what satellites observed from space. This movement of the rocks creates fractures or discontinuity which is better known as a fault. Becky was a science reporter at Live Science and The Pasadena Star-News; she has freelanced for New Scientist and the American Institute of Physics. This website contains information on faults and associated folds in the United States that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years). What are the Top Flower Bouquet Exporters in the World? Menges, C.M., and Pearthree, P.A., 1983, Map of neotectonic (latest Pliocene-Quaternary) deformation in Arizona: Arizona Bureau of Geology Mineral Technology Open-File Report 83-22, 48 p., scale 1:500,000. In 1993, the U.S. Geological Survey began developing a database for Quaternary faults and folds for the United States in earnest, largely supported by NEHRP but with significant support from many State surveys. Keyhole Quaternary Fault and Fold Database of the United States. What are the top 10 coal producing nations? In 2007, earthquake scientists led by the USGS, CGS, and SCEC estimated that there is a 63% probability of a magnitude 6.7 or greater earthquake in the Bay Area in the next 30 years. Geologic evidence demonstrates the existence of a Quaternary fault of tectonic origin, whether the fault is exposed for mapping or inferred from liquefaction or other deformational features. What countries have won the Nobel Prize in Physiology or Medicine? Moderate earthquakes have occurred in the high Sierra, the foothills and in the Central Valley. The database is designed to serve a variety of needs, both in terms of the user community and methods of delivering the data. What countries have hosted World Polo Championship? Map showing Quaternary faults in the western U.S. and Pacific Ocean. Turkey is prone to earthquakes, but the tremors of Feb. 6 stand out as the nation's worst in decades. What is a sinkhole and where is the largest discovered? "We estimate presumably horizontal displacements of rarely up to 5 meters [16 feet]," COMET researcher Milan Lazecky told Space.com in an email. In Which Countries Is Prostitution Legal? You can view historic damage photographs side-by-side with modern photos taken from the same vantage point. How Many Of World's Top 20 Museums Have You Been To? What are the top ten cycling destinations of this world? In 1999, it was updated to 1.8 Myr, and in 2009 it was revised to 2.6 Myr. The Quaternary fault map includes mapped geometries and attribute information for offshore fault systems located in California State and Federal waters. Virtual Tour using Google Earth. This movement maybe occurred rapidly, in the form of with earthquake - or may occur sluggishly, in the form of creep. Our website presentsfor the first timea single source that summarizes important information on paleoseismic (ancient earthquake) parameters. She later took a career break to pursue further education and added a Master's in Science from the International Space University, France, to her Bachelor's in Journalism and Master's in Cultural Anthropology from Prague's Charles University. This database contains information on faults and associated folds in the United States that demonstrate geological evidence of coseismic surface deformation in large earthquakes during the past 1.6 million years (Myr). Five earthquakes were detected in the PRE area with magnitudes between M L 1.6 and M L 3.5. The extent of the LiDAR data is shown by the cyan colored outlines. More than 20,000 people have been reported dead, and many victims are likely still buried underneath rubble as rescue operations proceed slowly, especially on the Syrian side, which has been ravaged by armed conflicts for years. The map clearly identifies the locations of the great earthquakes (M8.0 and larger) and the, This report provides trench photomosaics, logs and related site information, age data, and earthquake event evidence from three paleoseismic trench sites on the Bear River Fault Zone. The reference information about a fault in New Mexico viewed online on Jan 9, 2019would look like: U.S. Geological Survey and New Mexico Bureau of Mines and Mineral Resources, Quaternary fault and fold database for the United States, accessed August 1, 2019, at:https://www.usgs.gov/natural-hazards/earthquake-hazards/faults. Maps of these geologic structures are linked to a database containing detailed descriptions and references. However Compare Infobase Limited, its directors and employees do not own any responsibility for the correctness or authenticity of the same. What countries rank high in Social Progress Index? An official website of the United States government. This map was created by a user. A lock () or https:// means youve safely connected to the .gov website. What are the top ten coffee exporting countries? The hillshades will load once the user has zoomed into an area of interest. Sign in. Sacramento, CA 95814, Privacy & Social Media Policies|Terms of Use | Site Map, Chance of 1 or more M6.7 or greater earthquakes striking CA, Most Californians live within 30 miles of an active fault, Chance of 1 or more M6.7 or greater earthquakes striking CA*, Known faults in California (and scientists continue to discover new ones), Likelihood of one or more M7.0+ Quakes striking Northern CA*, Cascadia Subduction Zone & Mendocino Triple Junction, Cleveland Hills and Sierra Nevada faults & San Joaquin fault zone, Landslides, Liquefaction, Or Levee Failure, Likelihood of one or more M7.0+ Quakes striking Southern CA*, San Andreas and Garlock faults & San Joaquin fault zone, Landslides, liquefaction, or levee failure, Owens Valley fault & Eastern California shear zone, San Andreas & over 100 smaller active faults, California Earthquake Risk Map & Faults By County, Understanding the Earthquake Risk Where You Live, Homeowners Coverage Training Registration, CEA Residential Earthquake Damage Assessment (REDA) General Guidelines Training, CEA Residential Earthquake Damage Assessment (REDA) Engineering Guidelines Training, List of Notable and Major California Earthquakes, Mobilehomes & Manufactured Homes Coverages & Deductibles, Dec. 20th, 2022, a magnitude 6.4 quake struck a few miles off the coast of Humboldt County, San Francisco Bay Area has a high likelihood of future damaging earthquakes, 51 percent chance that the San Francisco region specifically will experience one or more magnitude-7.0 or greater earthquakes, if a seismic retrofit worth it in San Francisco, last major earthquake occurring in 1857: the magnitude 7.9 Fort Tejon quake, Raymond fault, the Santa Monica fault, the Hollywood fault, the Newport-Inglewood fault, why you should you be considering a seismic retrofit in Los Angeles, why it is worth it to earthquake retrofita home in San Diego.
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