Rescue teams worked through the night into Wednesday to find survivors of the 7.8 magnitude earthquake that hit Turkey and Syria on Monday, with the death toll going past 11,200. The Latest Earthquakes application supports most recent browsers, view supported browsers. It seems almost insensitive to start to have a deep dive into the science behind Monday's earthquake events in Turkey. What does Enterococcus faecalis look like? Many of the comments in the database provide justification for the paleoseismic parameters that were chosen to characterize the faults and folds. Although, 12201 Sunrise Valley Drive Reston, VA 20192, National Seismic Hazard Model Project Support, Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands), Region 12: Pacific Islands (American Samoa, Hawaii, Guam, Commonwealth of the Northern Mariana Islands), Seismic Hazard Model, Maps, and Site-Specific Data, https://www.usgs.gov/natural-hazards/earthquake-hazards/faults, 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. Over 2.4 million people live within close proximity to the fault today, not to mention the key infrastructure developments, including a major public transit system and the Caldecott Tunnel that run precariously through the fault. The New Madrid Seismic Zone and the Wabash Valley Seismic Zone are two of the largest fault lines in the Central United States. It is mandatory to procure user consent prior to running these cookies on your website. In fact, according to the Ohio Department of Natural Resources (ODNR) Geological Survey, the state has recorded at least 200 quakes since 1976. During the lifetime of the Keweenaw Fault, which may have been a few million years, there were probably hundreds of major earthquakes, separated by decades to millenia of quiet. What Are the 6 Most Dangerous Fault Lines in the USA? Earthquake epicenters are represented by blue and red dots. Ohio is one of the states that has a regulation issued by its Department of Insurance on matching. Even then-President James Madison and his wife Dolley reportedly felt shaking at the White House. Based on the duration of shaking as measured by the time decay of the amplitude of the seismogram. These faults are commonly found in collisions zones, where tectonic plates push up mountain ranges such as the Himalayas and the Rocky Mountains. The New Madrid Seismic Zone is located near where the Mississippi River meets the Ohio River in Cairo, Illinois. What Are the Mysterious Hessdalen Lights Glowing in the Night Sky Over Norway? An earthquake planning scenario is a description of a hypothetical earthquake, including projected ground shaking, damage, social disruption and economic losses. 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. The ODNR Division of Geological Survey's extensive collection of geologic data is available for interactive viewing and download using the Ohio Geology Interactive Map. It is located at the Tibetan . AUM-Point Location: Additional mine point locations. Magnitude 5.1. Join the more than 70,000 Arizonans (including the Arizona Department of Emergency and Military Affairs) on October 15 at 10:15 a.m. and Drop, Cover and Hold On. Pinterest. The USGS has many maps of live earthquake data. Thousands of bridges would collapse and railways would be destroyed, paralyzing travel across southeast Missouri. Shelby County recorded the most earthquakes this year. It is providesdesktop and mobile users a way to create custom geologic maps of their areas of interest. Still, a relatively high probability remains of at least a 6.5 magnitude occurring. Before that, most activity that occurred within the state was recorded by out-of-state operations. Information about a particular query includes information on the Distance to the Nearest Active Fault, Fault Name, Fault Segment Name, Year of the Mapping, and Map Scale used during the mapping.If you are currently located, or if want to know the . A lock or https:// means you've safely connected to the .gov website. After the 7.7 and 7.6 magnitude earthquakes in Kahramanmara and the 6.4 magnitude earthquakes in Hatay, the eyes were turned to the North Anatolian fault line. Although these instruments are no longer widely in use, ML values are calculated using modern instrumentation with appropriate adjustments. Its not just the West Coast that needs to watch out for tectonic obliteration. Based on the scalar seismic moment of the earthquake, derived from moment tensor inversion of the whole seismogram at regional distances (~10100 s; pass band based on size of EQ). Noticed by people driving in motor vehicles. EARTHQUAKES AND SEISMIC RISK IN OHIO Although most people do not think of Ohio as an earthquake-prone state, at least 120 earthquakes with epicenters in Ohio have been felt since 1776. Red and white beach ball represents the focal mechanism of 2011 Tohoku earthquake. Tremors from these quakes were felt as far away as Connecticut and caused damage as far north as Ohio. [] Reply. On average, Southern California has seen big quakes every 110 to 140 years, based on records of past earthquakes and studies of earthquake faults. Use the "County Bookmarks" tool (2) on the left side of the screen to zoom to a county of interest. All faults are related to the movement of Earths tectonic plates. Karst Detailed Mapping Completed Areas: These boundaries indicate the extent of where detailed karst mapping projects have been completed. Division of Geological Survey 2045 Morse Rd Columbus, OH 43229 614-265-6576 geo.survey@dnr.state.oh.us Geological Survey Website Eventually, that increased accuracy will enable geologists to better map Ohio's hidden faults. 3 earthquakes in the past 365 days. A magnitude for regional earthquakes based on the amplitude of the Lg surface waves as recorded on short-period instruments. Central and Eastern United, In this release of hazard maps we present numerous maps and data with varying parameters. 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. The last large event was in 1700, but there is a 37 percent chance of an 7.1+ in the next 50 years. Red dots denote instrumentally located earthquakes from differing networks through time, such as the U.S. Geological Survey and the Ohio Seismic Network, beginning in 1999. The narrower the search; the quicker the results will be available. In addition, a number of earthquakes with origins outside Ohio have been felt in the state. Then on Sep 10, 2006, a rare quake in the Gulf of Mexico, on a fault line the USGS was unaware existed. This broad research initiative resulted in new maps and studies of Quaternary faults. San Diego, Los Angeles and Big Sur are on the Pacific Plate. Bedrock geology 24K: Detailed bedrock map of Ohio. The map also uses star icons to indicate the location of seismic stations throughout Ohio. 06-02-pubs maps; 07-01-rocks in Ohio; 07-02-rocks ID common; 08-01-geology ice age; 09-01 . This product is more robust than the ILP products, mainly owing to the vast amount of data that has become available within the U.S. in the past 20-30 years and the importance that this data plays in regional and national seismic-hazard assessments (Petersen and others, 1996;Frankel and others, 1996). This layer depicts water resources found in the bedrock and surficial/glacial materials (aquifers) of Ohio, Guide to the Groundwater Vulnerability Map of Ohio(pdf) Explains how to read and understand the groundwater vulnerability index and hydrogeologicsettings information presented in the Ohio Geology Interactive Map. Earthquakes in Ohio; Oil and Gas Wells; Inland Lakes; Rivers, Streams & Wetlands; . The "earthquake swarms" monitored nearby injection wells in Arkansas, Montana, Texas, Ohio or Oklahoma that barely registered seismic activity from 1972 - 2008, has given new significance to-and created new fear around-a set of fault lines unknown to inhabitants, blamed as if active by an industry that rejects the accusations that . The last earthquake widely felt in Columbus, and most of Ohio, was on Aug. 23, 2011, when a magnitude 5.8 quake hit central Virginia. Although infrequent, this analysis reveals that a portion of our viewing area is prone to increased earthquakes. 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. The map is searchable using several parameters, including magnitude and year. A .gov website belongs to an official government organization in the United States. The last major (7.5 or higher) New Madrid-line earthquake was in December 1811 and January 1812. Watch. Click here to access the Ohio Earthquake Epicenters interactive map. Distance Range:0600 km. It is based on the maximum amplitude of a seismogram recorded on a Wood-Anderson torsion seismograph. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. There were no seismometers in the state at the time, so the shock was estimated to be in the 5.0 range on the Richter Scale, and also had a Modified Mercalli Scale (MM) rating of V, which translates to Rather Strong. ALLEN COUNTY, Ohio (FOX19) A magnitude 2.4 earthquake was recorded in northwest Ohio early Friday, just outside Lima and Fort Shawnee in Allen County, according to the U.S. Geological Survey. Only authoritative for smaller events, typically M<4.0, for which there is no mb or moment magnitude. This almighty quake caused extensive damage to the transportation systems in central Alaska. Still, one may question even the need for such a network given that the state only receives about 1 earthquake on average each year, often too small to be felt- typically in the 2.0 range or less. Namely, these are the North American plate in the east (encompassing large areas of North America and half of the Atlantic Ocean) and the Pacific plate in the west (extending from beneath the Pacific Ocean to the Mariana Trench). The probability of a repeat of 1811-1812 is considered extremely unlikely. 05 I've noticed logging activity that is polluting a stream with woody debris and mud. No, earthquakes of magnitude 10 or larger cannot happen. Learn how your comment data is processed. Between 1811 and 1812, this zone experienced some of the largest quakes in history. But opting out of some of these cookies may affect your browsing experience. A daily Columbus email you'll actually love. Earthquakes occur nearly every day in Washington. Ohio actually has a system of seismometers that monitors activity in the state. This numeric identifier allows us to clearly cite multiple-same year publications for authors. Searching an Area of Interest Zoom to an area of interest or search by address. Karst Depressions Depth in Feet: Generally, a shallow bowl or funnel-shaped area representing the extent of a sinkhole. What should I do? My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. In fact, just about every state east of the Continental Divide felt at least one of these quakes. The U.S. Geological Survey (USGS) National Seismic Hazard Map shows the strength of ground shaking that has a 1 in 50 chance of being exceeded in a particular place in the lower 48 states over a period of 50 years. Structure lines: Structural features of the bedrock, such as faults. For this compilation, we have limited our compilation to synthesis of published literature relevant to the United States. In fact, its greatest threat is well outside of the state, particularly in the infamous New Madrid Seismic Zone of southeast Missouri. Individual earthquake events driven along thrust faults may be major. TheAdvanced Searchform can be used to further limit the search results. Earthquake depths are approximate and given inkilometers (km) below the land surface. At divergent boundaries, lithospheric plates move apart and crust is created. This online map service is a robust tool for researching the state's geologic history, structure, and materials. Complete as few or many of the fields as you wish. In 1992, the USGS agreed to help compile maps and fault descriptions for countries in the Western Hemisphere (North, Central, and South America, as well as Australia and New Zealand). Sep 9, 2022 - scott sabol s world of weather cleveland earthquake history f a q from ohio fault lines map. This database was used to create thefault-source characterizationin the National Seismic Hazard Maps. You can report it here.) About Us; Staff; Camps; Scuba. This category only includes cookies that ensures basic functionalities and security features of the website. The brief historic record of Ohio earthquakes suggests a risk of moderately damaging earthquakes in the western, north east ern, and southeastern parts of the state. Most earthquakes in Ohio are minor and pass without notice. The largest earthquake ever recorded was a magnitude 9.5 on May 22, 1960 in Chile on a fault that is almost 1,000 miles longa megaquake in its own right. 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. Many tribes even left the region permanently. These fractures are countless and occur in a fractal manner. These quakes, despite the sparsely populated region at the time, were devastating. ); instead search for the fault number only. the Cascadia Subduction Zone last ruptured, That Trade War With China Is Finally Netting Some Good at Home. At approximately 9:48 AM, the first quake struck near the town of Anna, in Shelby County in the far northern Miami Valley of Western Ohio. . The Ohio Seismic Network, or OhioSeis, is a somewhat loose collection of volunteer and autonomously-running seismometers that began operations in 1999. First, a 7.8-magnitude earthquake struck Gaziantep, in southeastern Turkey along the border of Syria, followed by a 7.5-magnitude quake nine hours later about 100 miles north of the first, with . Our definition of published literature includes typical sources (journals and maps), as well as M.S. The database is intended to be the USGSs archive for historic and ancient earthquake sources used in current and future probabilistic seismic-hazard analyses. The Keweenaw Fault (Keweenaw Peninsula) is a major thrust faul. The map also uses star icons to indicate the location of seismic stations throughout Ohio. California sits at the border between two major tectonic plates the Pacific plate, which is moving northwest, and the North American plate, which is sliding past it to the southeast. All Rights Reserved. The fault and fold traces were digitized mainly by Richard Dart, with help from Dean Hancock*. The USGS and its partners monitor and report earthquakes, assess earthquake impacts and hazards, and . CLEVELAND Just before 11:47 a.m. on this day in 1986, a 4.96 magnitude earthquake, commonly rounded up to 5.0, happened about 24 miles east of Cleveland in southern Lake County, just north of the Geauga-Lake County line, according to The Ohio Department of Natural Resources. Earthquakes Modified MercalliIntensities are also provided. These cookies do not store any personal information. The computations for these maps and data used 50 year return periods on firm rock at 760 m/sec. Vibrations like a train passing close to a house. Building Stone. (Feel the earth move? However, it wasnt until the discovery of the Cascadia Fault in the 1960s that modern settlers truly understood the dangers they faced. 10 Can I move firewood from one Ohio county to another? All of the maps were prepared by combining hazard derived from spatially- smoothed historic seismicity with hazard from fault-specific sources. In 1884, Brooklyn was rattled by an earthquake originating near the Ramapo Fault System. Have questions? Magnitude Range:~2.0 to ~6.5 Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. A fault is a fracture or zone of fractures between two blocks of rock. The shock was felt from Washington, D.C., to Charleston, South Carolina, and Cincinnati, Ohio. Starting on the Susitna Glacier Thrust Fault, the rupture raced along the Denali Fault System and continued 220 kilometers until it reached the Totschunda Fault, rattling 70 more kilometers. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Source:Ohio Department of Natural Resources Division of Geological Survey, AGI's Critical Issues Program is generously underwritten in memory of Charles L. Weiner. Hecker, S., 1993, Quaternary tectonics of Utah with emphasis on earthquake-hazard characterization: Utah Geological Survey Bulletin 127, 157 p., 6 pls., scale 1:500,000. The estimated magnitude of this earthquake ranged from 7.0 to 7.9 with a surface wave magnitude of close to 8.5. West Virginia Onondaga Faults Lines . Reported by the National Earthquake Information Center (NEIC) for all earthquakes in the U.S. and Canada. An Ohio.gov website belongs to an official government organization in the State of Ohio. Considerable damage in poorly built or badly designed structures. This website uses cookies to improve your experience while you navigate through the website. The fields having pull-down menus provide all available options. Magnitude Type:mb_Lg, mb_lg, or MLg(short-period surface wave) On Earth, they are the result of activity with plate . Business. State (Jennings, 1975;Witkind, 1975;1975;1975;1976; Menges and Pearthree, 1983 #2073), regional (Nakata and others, 1982), and NationalHoward and others, 1978)maps were compiled to show the location and relative timing of major faults. Cardinal Collection News Release [5-26-22], Fall 2022 DNAP eNews - Prairie Restoration, Wild Ohio Harvest Community Video Library, Specialty Wildlife & Wild Animal Businesses, Coal and Industrial Minerals e-Permitting, 00-01 Orphaned/Injured - Wildlife - Common, 00-03 Landowner Family - Hunting - Common, 01-04 Wildlife - Nuisance - Division Help, 01-28 Wildlife - Other - Collection Permit, 02-10 Hunting - General - Communication Device, 02-35 Hunting - Furbearers - Bait Coyotes, 02-37 Hunting - Furbearers - Roads Bridges, 03-14 Fishing - Laws - Private Pond Release, 03-19 Fishing - Laws - Previous Day Catch, 02 National Floodplain Insurance Progam - Common, 04 Water Withdrawal Registration - Common, 19 Old Woman Creek Education Opportunities, 01 What does the Capital Improvement Program do? A vast fault line rupture in Nurdagi is seen cutting across a . Note that most faults that can affect residents are either onshore or just offshore. Glacial boundary: Maximum extent of the two most recent major glacial advances across Ohio. 04 How is ODNR connected to dams in Ohio? American Geosciences Institute. Distance Range: 010 degrees In some areas of the country, with relatively dense broadband coverage, USGS can compute Mwr consistently to as small as M3.5. This link will open in a new window, Cardinal Collection News Release [5-26-22], Fall 2022 DNAP eNews - Prairie Restoration, Wild Ohio Harvest Community Video Library, Specialty Wildlife & Wild Animal Businesses, Coal and Industrial Minerals e-Permitting, 00-01 Orphaned/Injured - Wildlife - Common, 00-03 Landowner Family - Hunting - Common, 01-04 Wildlife - Nuisance - Division Help, 01-28 Wildlife - Other - Collection Permit, 02-10 Hunting - General - Communication Device, 02-35 Hunting - Furbearers - Bait Coyotes, 02-37 Hunting - Furbearers - Roads Bridges, 03-14 Fishing - Laws - Private Pond Release, 03-19 Fishing - Laws - Previous Day Catch, 02 National Floodplain Insurance Progam - Common, 04 Water Withdrawal Registration - Common, 19 Old Woman Creek Education Opportunities, 01 What does the Capital Improvement Program do? The Ramapo Seismic Zone, Pennsylvania, New Jersey, and New York. The quake was felt in a total of 8 states and parts of Canada. 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. C/Yellow. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Experts said they are not aftershocks, but actual earthquakes. But opting out of some of these cookies may have an effect on your browsing experience. Share sensitive information only on official, secure websites. The largest earthquake (magnitude 5.1) caused damage in 1937. lithosphere Plate tectonics is the theory that Earths outer shell is divided into large slabs of solid rock, called plates, that glide over Earths mantle, the rocky inner layer above Earths core. The epicenter of this earthquake was near Wilkesboro, where intense shaking caused bricks to fall from chimneys. 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. The last major (7.5 or higher) New Madrid-line earthquake was in December 1811 and January 1812. 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. An earthquake on April 9, 1900, near Berea, southwest of Cleveland, caused localized damage. Ohio. Antarctica has the least earthquakes of any continent, but small earthquakes can occur anywhere in the World. Its the most active earthquake zone east of the Rocky Mountains. The 4th and most powerful in the series hit a few weeks later on February 7th. Potential Effects of Shaking. GIS files (16 MB ZIP file) 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). Active faults in California. Today millions of people live in densely populated urban areas like St. Louis and Memphis, making this zone one of the biggest concerns for the Federal Emergency Management Agency. 2019 The last earthquake in the area was in 2019, according to the Ohio Department of Natural Resources. You can sort the data by time of most recent movement (4 inclusive categories) or slip rate (4 exclusive categories). The magnitude of an earthquake is related to the length of the fault on which it occurs. Its main objective was to compile a World Map of Active Faults (Vladimir Trifonov, chairman). The searchable paleoseismic characteristics includetimeof most recent prehistoric deformation,yearof historic deformation, andslip-ratecategory. The nearest active one is the New Madrid Fault Line, about 350 miles west of Cincinnati. 13 A nearby property owner is burning trash and the smoke is bothering us. Seismometer station locations for the current Ohio Seismic Network (2016present day) are denoted by yellow stars; locations are approximate. FEMA has funded a series of studies on the fault line, including one from 2009 where researchers from Virginia Tech teamed up with researchers from the University of Illinois. Only List Earthquakes Shown on Map . The city of Memphis could see 4,000 deaths resulting from a break in the New Madrid Seismic Zone. This quake was on the afternoon of January 1, 1913, at 1:28 p.m. near the town of Union in Union County. Copyright 2023. It is suggested (see text) that the fissure was opened as a result of Mid-Tertiary rupturing of the Kentucky River fault along with uplift of the Lexington peneplain. Ohio has a fund to insure property that is in danger of sinking due to its proximity to an old coal mine . 82 km S of Manokwari, Indonesia. Earthquakes in 2019 At least six earthquakes have been centered in Ohio this year: June 10 Eastlake in Lake County, with a preliminary reading of 4.2. This event was literally felt across the nation, even causing waves in pools and lakes in Texas and Louisiana! Turkey's two main fault zones the . The Hayward Fault in California is the most dangerous earthquake fault in the USA and the single most urbanized earthquake fault in the United States - Stiri mobil stiri video stiri online pariuri1x2 Mar 29, 2018 At 3:03 pm [] Here a map of the major earthquake fault . Searchable structural characteristics includelengthof fault or fault section,averagestrikeof fault or fault section,sense of movement, anddip directionof the fault. According to the active fault lines map of This section lets visitors see quakes that have occurred anywhere in the world in the last week. A lock () or https:// means youve safely connected to the .gov website. Share sensitive information only on official, secure websites. Lithospheric plates are regions of Earths crust and upper mantle that are fractured into plates that move across a deeper plasticine mantle. One of the most historically active seismic areas is in Shelby and Auglaize Counties and portions of some adjacent counties in western Ohio, known as the western Ohio seismic zone (also referred to as the Anna seismogenic zone). Faults with evidence of Holocene (about 10,000 . A: Cincinnati is not on or close to a fault line, Kilinc says. Check out the information below for some explanation of map features and useful links. They say the maximum on the San Andreas fault running up and down the West Coast would be an 8.3 based on computer models. Often below the ground surface and buried by glacial material. Without an earthquake endorsement, there is no coverage under your homeowners policy . Starting in the early 1970s, mainly in response to national concerns about the siting of nuclear reactors, scientists needed to locate active and Quaternary faults and document their characteristics. A .gov website belongs to an official government organization in the United States. - Common, 02 How do I review information for a professional services project? The data presented in the compilation are extensively referenced using the standard USGS reference style, with the exception of attaching a unique number to each cited reference for convenience. For more details, see Quaternary . An official State of Ohio site. This small seismic zone in western Ohio has had moderately frequent earthquakes at least since the first one was reported in 1875. FIG. The fault type is subducting. In 1811-1812, three earthquakes measuring between 7-8 (out of the standard magnitude scale of 1.0-10.0) in magnitude originated from this fault. Geologic mapping programs in the state geological sur veys and the U.S. Geological Survey are therefore critical to public safety. CLEVELAND Just before 11:47 a.m. on this day in 1986, a 4.96 magnitude earthquake, commonly rounded up to 5.0, happened about 24 miles east of Cleveland in southern Lake County, just north of the Geauga-Lake County line, according to The Ohio Department of Natural Resources. Precambrian 100-ft contours: Elevation (relative to sea level) of the top of the deep, ancient Precambrian rock. The New Madrid Seismic Zone and the Wabash Valley Seismic Zone are two of the largest fault lines in the Central United States. For each earthquake, users can click on the symbol to find out specific information and access a full earthquake report. What does Enterococcus faecalis look like? throughout the United States. Modern continents hold clues to their distant past. Aug 15, 2020 - northeastern ohio january 1986 from ohio fault lines map. Stickney, M.C., and Bartholomew, M.J., 1987, Preliminary map of late Quaternary faults in western Montana: Montana Bureau of Mines and Geology Open-File Report 186, 1 pl., scale 1:500,000. To zoom in, either spin the mouse wheel or click the + symbol (1) in the upper left corner of the map viewer. This link will open in a new window. Secure .gov websites use HTTPS For more information on earthquake magnitude types calculated for seismic events in Ohio, see below. The New Madrid Fault, also called the New Madrid seismic zone, is actually a series of faults, or fractures, at a weak spot in the earth's crust called the Reelfoot Rift.
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