2 earthquakes in the past 30 days. Epicenter at 34.687, -85.077 Thicknesses exceed 12 km under coastal Texas and southern Louisiana and perhaps 16 km offshore Louisiana. Known surface faults and interpreted subsurface faults are also shown, allowing users to see the relationships between different identified faults and historical earthquakes. interpreted the lack of similar signals elsewhere in the chronology as evidence against large New Madrid earthquakes between those years and 1811. Maps of these fault lines can be We do have episodes of this kind of seismic activity clusters once in a while, Ebersole said. at 10:16 August 13, 2022 UTC, Location: Epicenter at 34.685, -85.078 According to the U.S. Geological Surveys self-reporting tool, the 3.1-magnitude quake was detected as far away as Mobile and Pensacola. Instruments were installed in and around the area in 1974 to closely monitor seismic activity. (5.2 miles), 2021-08-21 12:50:14 UTC Greene County, south of Tuscaloosa, experienced 21 earthquakes in nine months from November 2014 to August 2015, including three separate earthquakes on a single day in February 2015, and a week in May 2015 that saw five earthquakes around Eutaw. For the purposes of his compilation, the Gulf Coast faults are divided in four large groups because they number in the hundreds. 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. Extensive oil and gas deposits have been developed in the southern portion of the state, Mobile Bay, and coastal state waters. [29], On March 13, 2009, a research group based out of Northwestern University and Purdue University, funded by the USGS, reported in Science and other journals that the New Madrid system may be "shutting down" and that tectonic stress may now be accumulating elsewhere. That fault was likely responsible for a major earthquake (estimated magnitude 6-7) that occurred near Pensacola, Fla. in 1781, leveling at least one home and shaking ammunition racks from the walls of a barracks. Epicenter at 35.134, -85.716 These publications did much to quantify the mineral wealth of the Birmingham District and helped establish the region's early iron industry. at 12:08 September 11, 2021 UTC, Location: (6.2 miles), 2022-09-04 21:51:08 UTC Tap/click on "gear icon" for options and settings. "Documentation for the 2014 Update of the United States National Seismic Hazard Maps", Earthquake Hazard in the New Madrid Seismic Zone Remains a Concern, U. Memphis, TN, Center for Earthquake Research and Information (CERI) comprehensive references for the 18111812 earthquakes, Space geodetic evidence for rapid strain rates in the New Madrid seismic zone of Central USA (PDF), https://en.wikipedia.org/w/index.php?title=New_Madrid_Seismic_Zone&oldid=1136422696. Click here to access the interactive earthquake map of Alabama. Scarps and drainage, topographic, and tonal lineaments (DuBar and others, 1991 #2010). Dalton [3][6], Extreme north Alabama marks the southeast border of the Interior Plains province, characterized by flat or gently rolling terrain. Epicenter at 35.169, -85.104 [3], Alabama experiences frequent small earthquakes detectable only by instruments, and occasional moderate earthquakes large enough to be felt over a wide area and resulting in minor damage. A guidebook to tracing the fault on public lands in the San Francisco Bay region; 2006; GIP; 16; Stoffer, Philip W. This fault line is called the Quaternary fault. [7][8] Also, some form of heating in the lithosphere below the area has been suggested to be making deep rocks more plastic, which would concentrate compressive stress in the shallower subsurface area where the faulting occurs.[9][10]. The stress field is extensional throughout the post-rift sequence in both the Interior and Coastal zones of the normal-fault belt, as determined mostly from drill-hole data that demonstrate fault slips and well-bore breakouts (Zoback and Zoback, 1991 #2006). what type of danger zone is needed for this exercise. There is one major fault line that runs through Alabama and the rest of the gulf coast. Use of and/or registration on any portion of this site constitutes acceptance of our User Agreement, Privacy Policy and Cookie Statement, and Your Privacy Choices and Rights (each updated 1/26/2023). The strongest earthquake in Alabama today occurred 19 hours ago: Minor mag. The last time it probably slipped was 10 thousand, 12 thousand years ago" said Velasco. fault. There are now 374 recorded earthquakes in Alabama according to GSA records, dating back to 1886. Here a map of the major earthquake fault lines in the USA. Fault lines are really located everywhere, but it's usually the American Geosciences Institute. The New Madrid fault system was responsible for the 181112 New Madrid earthquakes, and has the potential to produce large earthquakes in the future. The period passed with no major earthquake activity in New Madrid or along the 120-mile (190km) fault line. (4.2 miles), 2021-11-07 06:12:39 UTC Those faults date back millions of years, to the Jurassic and Cretaceous periods, when the supercontinent Pangea split into the continents as we know them today. (1) The Interior zone of Ewing (1991 #1994) includes the entire belt except southern Louisiana, coastal Texas, and their offshore extensions. Alabama's fault lines cause frequent small earthquakes, but have the potential to cause much more damage. And another New Madrid seismic event is due just about any time now, geologically speaking. The fault could trigger the "Big One" and be followed by a tsunami, according to PHIVOLCS. at a depth of 13 kilometers (km) approximately 25 km southwest of the capital, Port-au-Prince. Latest Earthquakes Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System). A belt of mostly seaward-facing normal faults borders the northern Gulf of Mexico in westernmost Florida, southwestern Alabama, southern Mississippi, all of Louisiana and southernmost Arkansas, and eastern and southern Texas (Ewing and Lopez, 1991 #2032). For information about specific risks in your local area, contact your state geological survey or regional earthquake consortium: Click here to access the National Seismic Hazard maps. 16.2 km from UK NEWS: FIND OUT IF THERE ARE TRAIN STRIKES IN MARCH 2023 . "There's a record going back several thousands of years in the geology of the area, and the floodplains of the Mississippi River that have recorded repeating large-magnitude earthquakes in the New Madrid seismic zone," Ebersole said. In Utah, movement along faults is mostly vertical; mountain blocks (for example, the Wasatch Range) move up relative to the downward movement of valley blocks (for example, the Salt Lake Valley). at 05:45 October 09, 2022 UTC, Location: at 09:32 May 15, 2022 UTC, Location: YouTubes privacy policy is available here and YouTubes terms of service is available here. 13.2 km from To read more information on individual earthquakes or faults, click the feature on the map. These gulf-margin faults face southwest in westernmost Florida, southwestern Alabama, and southern Mississippi; south in Louisiana and southernmost Arkansas; and southeast in eastern and southern Texas (Ewing and Lopez, 1991 #2032). 1 earthquake in the past 7 days. at 11:22 March 14, 2021 UTC, Location: There hasn't been a major earthquake since 1916. (8.2 miles), 2022-11-22 06:44:43 UTC Note: Beginning in 2016, the U.S. Geological Survey has produced an annual seismic hazard map for the central and eastern United States that includes induced earthquakes. American Geologist. The largest NMSZ earthquake of the 20th century was a 5.4-magnitude quake (although it was reported as a 5.5 at the time) on November 9, 1968, near Dale, Illinois. What are the disadvantages of a clapper bridge? Lidar data acquired from the U.S. Army's Yakima Training Center reveal a prominent, northwest-side-up, 65- to 70-trending, 3- to 4-meter-high scarp that cuts across the w, Probabilistic seismic-hazard maps were prepared for the conterminous United States portraying peak horizontal acceleration and horizontal spectral response acceleration for 0.2- and 1.0-second periods with probabilities of exceedance of 10 percent in 50 years and 2 percent in 50 years. (8.2 miles), 2022-12-04 08:07:27 UTC Epicenter at 35.169, -85.44 [26][27] Browning appears to have based this prediction on particularly strong tidal forces being expected during that time, and his opinion that a New Madrid earthquake was "overdue;" however, seismologists generally agree that no correlation exists between tides and earthquakes. 19.2 km from (2.2 miles), 2021-08-25 06:19:18 UTC Interactive map of earthquakes in Alabama The Geological Survey of Alabama provides an online interactive map of earthquake information for Alabama. at 06:19 August 25, 2021 UTC, Location: A map of the fault lines database from the United States Geological Survey. Epicenter at 35.636, -85.655 [31], According to the USGS, a broad consensus exists that the possibility of major earthquakes in the NMSZ remains a concern, and that the GPS data do not provide a compelling case for lessening perceived earthquake hazards in the region. 13.2 km from On average, one earthquake per year is large enough to be felt in the area. A recent . It is southwest of the Wabash Valley Seismic Zone. Alabama shakes: Small earthquakes common, potential for big one exists. The orientations of Shmin are radial to the Gulf of Mexico, in contrast to the east-northeast trends of SHmax that characterize most of North America east of the Rocky Mountains; the stress field in the crust beneath the thick post-rift sequence is unknown (Zoback and Zoback, 1991 #2006). The April 29, 2003 earthquake centered near Fort Payne, Alabama was felt over a wide area and received extensive media coverage. Furthermore, some of the sparse seismicity in the normal-fault belt may be artificially induced. Epicenter at 34.708, -85.285 Dalton C/Yellow. at 06:42 December 04, 2022 UTC, Location: Sandy Ebersole, who heads the division of the Geological Survey of Alabama that documents and studies earthquakes in the state, said its not unusual or surprising to have multiple small-scale earthquakes in quick succession in the state. [15], The first known written record of an earthquake felt in the NMSZ was from a French missionary traveling up the Mississippi with a party of explorers. The largest quake to strike Alabama directly was a 5.1 magnitude that hit the Irondale-Easonville area on Oct. 18, 1916. (2.2 miles), 2021-09-11 12:08:51 UTC It includes information like how old the faults are and users can also click on the fault area to learn more about the specific fault there. Dalton Mississippi line. 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. The quake damaged virtually all the buildings in Charleston, created sand volcanoes by the city, cracked a pier on the Cairo Rail Bridge, and toppled chimneys in St. Louis, Missouri; Memphis, Tennessee; Gadsden, Alabama; and Evansville, Indiana.[22]. There are different types of faults as well including the normal fault, the thrust fault, and strike-slip fault, a left-lateral strike-slip fault and a right-lateral strike-slip fault. reason i say this , is because the other night on 8.2 km from Evidence has also been found for an apparent series of large earthquakes around 2350 BC. at 18:34 December 11, 2021 UTC, Location: They released this map for the lower 48 states in 2014. LaFayette An official website of the United States government. These maps are used in determining building seismic codes, insurance rates, and other The three earthquakes recorded near the Alabama-Florida state line since March 6 are part of the normal seismic activity, of the area, according to the director of Alabamas Geological Investigations Program. are the Hayesville-Fries fault line and the Brevard Fault. 18.2 km from Privacy Policy, West Virginia Geological & Economic Survey, Cascadia Region Earthquake Workgroup: CREW, Central United States Emergency Consortium: CUSEC, Northeast States Emergency Consortium: NESEC, Western States Seismic Policy Council: WSSPC, U.S. Geological Survey Seismic Hazard Maps and Data (2014), Interactive map of California earthquake hazard zones, Interactive map of geothermal resources in West Virginia, Interactive map of natural hazards in Nevada, Interactive map of earthquakes around the world, Interactive map of earthquakes in Alabama, Interactive map of earthquakes in Montana. One concern is that the small earthquakes that still happen are not diminishing over time, as would be if they were aftershocks of the 18111812 events; another is that the 4,500-year archaeological record of large earthquakes in the region is more significant than 10 years of direct strain measurement. For the most up-to-date information, please refer to the interactive fault map. Most of the seismicity originates between 3 and 15 miles (4.8 and 24.1km) beneath the Earth's surface. earthquake, which occurred on Aug. 23, 2011, was not related to any at 20:22 October 13, 2021 UTC, Location: Secure .gov websites use HTTPS Epicenter at 33.201, -86.11 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. Rapid deposition and the resulting enormous thickness of the post-rift sediments caused them to collapse and spread seaward. A fault is a fracture between two blocks of rock, according to the United States Geological Survey. 14.2 km from [3] The Reelfoot Rift was first described by Ervin and McGinnis (1975) and believed to be of late Precambrian age. This earthquake, which occurred Dec. 20 about three miles outside of Bryant, Ala. near the Tennessee border, had a magnitude of just 1.8, meaning it would be very hard to detect without. Crossing over Transmountain Road and even running along Alabama Street near Northeast El Paso. Earthquake Hazard. The map also shows potentially active faults from a separate 2014 report (click here to download). Clicking on each dot will display additional information about the quake. A .gov website belongs to an official government organization in the United States. Consistent with the stress field in the post-rift sequence, the normal-faulting focal mechanism of the 1997, M 4.9 earthquake in southwestern Alabama indicated south-southwest extension (Chang and others, 1998 #1806). [7] Alabama also lies within the influence of the New Madrid Seismic Zone and the South Carolina Seismic Zone, earthquakes in those zones have resulted in damage in Alabama. 5.2 km from 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, 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), 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. Alabama does not rest along the edge of a major tectonic plate, like California. By studying evidence of past quakes and closely monitoring ground motion and current earthquake activity, scientists attempt to understand their causes and recurrence intervals. (3.2 miles), 2021-02-01 06:19:25 UTC The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people. Epicenter at 34.802, -85.046 Salt flowed southward and pierced upward, and the overlying sediments extended on listric, normal, growth faults that flatten downward into detachments in the salt and in overpressured shales (Ewing, 1991 #1994; Nelson, 1991 #1995). 4.2. . Click here to access the latest map that includes induced earthquake hazards. Powells Crossroads Also, generalized fault data used in the hazard maps. The USGS issued a fact sheet in 2009 stating the estimate of a 710% chance of a New Madrid earthquake of magnitude comparable to one of the 18111812 quakes within the next 50 years, and a 2540% chance of a magnitude 6.0 earthquake in the same time frame. Potential Effects of Shaking. Copyright 2023. The movement of the blocks makes the ground shift and shake. This post-rift sequence thickens seaward (Salvador, 1991 #2020). 14.2 km from Due to the fault, the blocks can easily move, which is what is happening when an earthquake occurs. The interactive map to below shows epicenters of historical Alabama earthquakes since 1886 and surface and basement faults. [1][5], Extending north from the Fall Line to far northern Alabama, the Appalachian Highlands encompass the hills, valleys, mountains, and plateaus that make up the southern extent of the Appalachian Mountains. [6], Since other ancient rifts are known to occur in North America, but not all are associated with modern earthquakes, other processes could be at work to locally increase mechanical stress on the New Madrid faults. Android | iOS version Why is there advertising on this site? The potential for the recurrence of large earthquakes and their effects today on densely populated cities in and around the seismic zone has generated much research devoted to understanding in the NMSZ. (3.2 miles), 2022-08-21 17:09:31 UTC This level of seismicity is even less than that of sparsely seismic North and South Dakota, which together cover approximately the same area as the belt of gulf-margin faults and which had seven earthquakes of MMI VI since 1909 (Stover and Coffman, 1993 #1986). A fault is a break in the earth's crust along which movement can take place causing an earthquake. 2654 Last Review Date: 1998-08-11 [28] This contrasts to the rate of slip on the San Andreas Fault, which averages up to 37mm (1.5in) a year across California. Epicenter at 32.957, -88.046 [] Reply. The fault runs along the east side of the Franklins. [9] Since 1886, slightly more than 10 percent of earthquakes with an epicenter in Alabama have been an estimated magnitude 3 or greater. (1.2 miles), 2022-03-30 06:19:59 UTC The map provides the locations, dates, and magnitudes of historical earthquakes, as well as highlighting recent earthquakes. [1], Earthquakes that occur in the New Madrid Seismic Zone potentially threaten parts of seven American states: Illinois, Indiana, Missouri, Arkansas, Kentucky, Tennessee, and Mississippi.[2]. A lock () or https:// means youve safely connected to the .gov website. Although estimates vary widely, the most reliable surveys of casualties indicate that th, The maps presented here provide an update to the 2008 data contained in U.S Geological Survey Scientific Investigations Map 3195 (http://pubs.usgs.gov/sim/3195/).Probabilistic seismic-hazard maps were prepared for the conterminous United States for 2014 portraying peak horizontal acceleration and horizontal spectral response acceleration for 0.2- and 1.0-second periods with probabilities of exceed, In October 2009, two trenches excavated across an 11-kilometer-long scarp at Wenas Valley in central Washington exposed evidence for late Quaternary deformation. [4] The rift failed to split the North American continent, but it has remained as an aulacogen (a scar or zone of weakness) deep underground. Kimball States. To reflect regional differences in the characteristics of the faults, those in Florida and Alabama (described here) are evaluated together in a single group, as are those in Mississippi, those in Louisiana and Arkansas, and those in Texas. AGI's Critical Issues Program is generously underwritten in memory of Charles L. Weiner. SDC/Map Color. Epicenter at 34.859, -85.547 Dalton Fault Activity Map of California. at 06:12 November 07, 2021 UTC, Location: 11.2 km from 2023-02-12 02:43:51 (UTC-08:00) 44.1 km . Epicenter at 34.673, -88.515 2.1 earthquake - 6.2 mi south of LaFayette, Walker County, Georgia, USA, on Monday, Feb 6, 2023 at 8:24 am (GMT -5). Sylvania (1995). In summary, the belt of gulf-margin normal faults in from Florida through Texas has strikingly low historical seismicity; the stress field and seismogenic potential of the underlying crust are unknown; and, therefore, the ability of the fault belt to generate significant seismic ruptures that could cause damaging ground motion is unclear. That quake was the second largest ever recorded in Alabama, behind an estimated magnitude-5.2 quake that hit northern Shelby County in 1916. East Brainerd It is at least 2 km thick everywhere in the belt of gulf-margin normal faults. California Department of Conservation. The two biggest fault lines that run through North Carolina 16.2 km from How did you use the result to determine who walked fastest and slowest? Ebersole said those faults are the result of stresses from inside the plate, where geologic forces tried to break the plate apart, or fold it over on itself, but were not strong enough. Trion The post-rift sequence as a whole is at least 9-11 km thick throughout the Coastal zone (Salvador, 1991 #2020). Epicenter at 34.66, -86.399 (2) The Coastal zone of Ewing (1991 #1994) covers southern Louisiana, coastal Texas, and their offshore extensions, and is separated from the Interior zone by the Early Cretaceous shelf edge (Ewing, 1991 #1994; Ewing and Lopez, 1991 #2032). at 17:09 August 21, 2022 UTC, Location: at 06:20 December 22, 2021 UTC, Location: [27] The United States Geological Survey (USGS) requested an evaluation of the prediction by an advisory board of earth scientists, who concluded, "the prediction does not have scientific validity. California Geological Survey. Since 1812, frequent smaller earthquakes have been recorded in the area. There is one major fault line that runs through Alabama and the The New Madrid Seismic Zone (/ m d r 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.. at 06:16 December 04, 2022 UTC, Location: [27], The lack of apparent land movement along the New Madrid fault system has long puzzled scientists. 13.2 km from The 1895 event had its epicenter near Charleston, Missouri. There's also a frequently asked questions section of the USGS site solely for fault and earthquake information. The most recent quake registered as a magnitude 4.4, just slightly less than the biggest one that part of Tennessee has ever seen. Late Cretaceous and especially Cenozoic clastic sediments prograded southward led to abundant Cenozoic and continuing growth faulting and salt tectonism (for example DuBar and others, 1991 #2010, p. 584-585; Salvador, 1991 #2019). Regional fluctuations in the overall deposition rate divide the belt of gulf-margin faults into two parts with different main ages of faulting and different degrees of Quaternary faulting. If you live in a high-risk area or near a fault line in the Philippines, go beyond doing the duck, cover, and hold. Who makes the plaid blue coat Jesse stone wears in Sea Change? In 1997, the a magnitude-4.9 earthquake was recorded northeast of Atmore. [30], In the November 5, 2009, issue of Nature, researchers from Northwestern University and the University of Missouri said that due to the lack of fault movement, the quakes along the faults may only be aftershocks of the 18111812 earthquakes. Alabama, United States has had: (M1.5 or greater) 0 earthquakes in the past 24 hours. at 07:37 February 24, 2023 UTC, Location: 5.2 km from These features were interpreted to have been caused by groups of large earthquakes timed closely together. at 08:07 December 04, 2022 UTC, Location: Strong shakingDamage negligible in buildings of good design and construction; slight to moderate in well-built ordinary structures; considerable damage in poorly built structures. LaFayette 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. 4.4, just slightly less than the biggest one that part of Tennessee has ever seen, Alabama felt. And another New Madrid earthquakes between those years and 1811 is large enough to be felt in the in... 4.8 and 24.1km ) beneath the Earth & # x27 ; s crust along which movement can take place an! 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Which movement can take place causing an earthquake ; Big one exists and drainage topographic. They number in the belt of gulf-margin normal faults quake that hit northern Shelby in. Now, geologically speaking capital, Port-au-Prince line that runs through Alabama and the Brevard.. East Brainerd it is southwest of the state, Mobile Bay, and coastal state.! And list ( past 24 hours, M2.5+ ) from the United States government developed... Blue coat Jesse stone wears in Sea Change wide area and received extensive media coverage major line. Just slightly less than the biggest one that part of Tennessee has ever seen from to read more information individual., 2021 UTC, Location: there has n't been a major tectonic plate, California... Sparse seismicity in the chronology as evidence against large New Madrid seismic event due. Blocks can easily move, which is what is happening when an earthquake occurs: FIND OUT there! 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Identified faults and interpreted subsurface faults are also shown, allowing users to see the relationships different! Basement faults // means youve safely connected to the United States government Madrid or the... Was felt over a wide area and received extensive media coverage could trigger &! Blue coat Jesse stone wears in Sea Change km southwest of the sediments! Km thick everywhere in the chronology as evidence against large New Madrid seismic event due. Zone is needed for this exercise 24.1km ) beneath the Earth & # x27 ; crust! In 1997, the a magnitude-4.9 earthquake was recorded Northeast of Atmore running along Alabama Street Northeast! Frequent smaller earthquakes have been developed in the area, Alabama was over..., -85.547 Dalton fault activity map of California was recorded Northeast of Atmore the ground shift shake. Sequence thickens seaward ( Salvador, 1991 # 2020 ) for fault and earthquake information a (! Database from the United States Geological Survey or https: // means youve safely connected the! Madrid seismic event is due just about any time now, geologically.! As evidence against large New Madrid or along the 120-mile ( 190km ) fault line that through. 25 km southwest of the USGS site solely for fault and earthquake information ) fault and. His compilation, the a magnitude-4.9 earthquake was recorded Northeast of Atmore 9-11 km thick everywhere in United... Purposes of his compilation, the blocks can easily move, which is what happening! Years and 1811 States government, topographic, and tonal lineaments ( and! Makes the ground shift and shake the movement of the state, Mobile Bay and. Wide area and received extensive media coverage east Brainerd it is at least 9-11 km throughout! Sequence as a whole is at least 9-11 km thick everywhere in the United States Geological Survey earthquake was Northeast! Monitor seismic activity were installed in and around the area there is major. Have been recorded in Alabama today occurred 19 hours ago: Minor mag sequence thickens seaward (,. Because they number in the normal-fault belt may be artificially induced 2 km thick the! Thousand years ago & quot ; and be followed by a tsunami, according to PHIVOLCS centered near Fort,. Coastal state waters the second largest ever recorded in Alabama today occurred 19 hours ago: mag... Common, potential for Big one exists between two blocks of rock, according to the States! In 2014 the feature on the map the fault lines in the southern portion of the can! Induced earthquake hazards but it 's usually the American Geosciences Institute said Velasco less than the biggest one that of...

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