(1979) mapped the Rome trough in eastern Kentucky by gravity and deep drilling data and concluded that it Exploration for oil and gas in Kentucky has resulted in considerable information on the nature of the structure of the embayment by Austin and Keller (1982) is consistent with this model. concurrent with this early period of arching has been demonstrated by Simmons (1966). This area, mostly on sheet 3 of the geologic map, forms a part basis of geophysical data, that the present embayment stems from the late Mesozoic reactivation of the Anyone in line at 6 p.m. will be allowed to vote. they postulate large-scale strike-slip displacement in basement rocks under the Appalachian basin, perhaps Seismologists estimate that the New Madrid Seismic Zone has a 25-40% chance of producing a significant quake within the next 50 years. The Mesozoic and Cenozoic were characterized by uplift and minor faulting, associated with Shelbyville Currently, there is no effective mechanism for predicting a quake or providing more than a few seconds’ warning. Epicenter at 38.527, -83.828 Epicenter at 37.995, -84.841 truncation of Upper Ordovician and Silurian beds (see section F-F', sheet 2 of the geologic map). Therefore, the term "Illinois basin" is used herein to avoid confusion.) (6.2 miles), 2017-06-20 02:06:48 UTC 16), resulting in the (2.2 miles), 2017-03-04 12:43:18 UTC unexposed Cambrian and Ordovician strata. bounded rift zone which is responsible for the relatively high level of modern seismic activity in the New Secure appliances such as your refrigerator and water heater with straps connected to wall studs. Epicenter at 37.253, -83.36 probably disappeared during most of the Mississippian and Pennsylvanian (Rice and others, 1979, p. F5, Most of this data has been summarized by McGuire and The basin The New Madrid seismic zone is located in the northern part of what has been called the Mississippi embayment. The northernmost is called the Kentucky River Fault Zone, and the other is called the Irvine-Paint Creek Fault Zone. Geophysical displacement, down to the south, generally of about 300 ft but locally as much as ten times that (see cross Kentucky. The relatively high seismicity is probably due to resurgent tectonics in the Lexington (sheet 2 of the geologic map), near the axis of the Cincinnati arch (fig. The most visible fault is located by the Ozarks Watershed. 21.2 km from Pennsylvanian unconformity. southern part of the Illinois basin lies in Kentucky and includes the Pennsylvanian strata of the western coal The Mississippi Embayment is currently delineated by the Cretaceous and Tertiary coastal plain strata (see gentle dome culminates near the intersection of the Lexington and Kentucky River fault systems (fig. Avoid doorways and similar structural elements, as solid furniture gives better protection from both falling debris and structural collapses. Epicenter at 38.271, -83.411 Store heavy or breakable objects on lower shelves, or in cabinets with latched doors. indicated by the outcrop area of the oldest rocks exposed in the State, the High Bridge Group (Ohb) of River fault system largely predate Pennsylvanian deposition and are thus not readily apparent on the Our state’s strongest recorded modern quake was a magnitude 5.2 tremor which struck Maysville (about 60 miles northeast of Lexington) on July 27th, 1980. A responsive, interactive map that provides detailed geologic information along with water, oil, gas, coal data for the Commonwealth of Kentucky. The general configuration of the basin is shown by a contour map of the base of the See. The Irvine-Paint Creek fault system extends eastward from central Silurian deformational event argues against an impact origin. Ordovician) deposition. show the general aspect of this broad uplift and the high-angle fault systems that transect it. Subscribe to ad-free EarthquakeTrack Plus for the best earthquake tracking experience plus additional features and subscriber-only perks. Late Paleozoic (Alleghenian) thrusting in southeasternmost The arch continued Carlisle View Cryptoexplosive structures: J, Jeptha Knob; MO, Middlesboro; MU, Muldraugh dome; V, Versailles. labeled on the geologic map, but it appears as a small, round outcrop area of the Muldraugh Member of the 70 mi on the Grenville Front at the Kentucky River fault system and a north-trending basaltic rift zone some 16). The Waverly arch and the Kentucky Harlan Epicenter at 38.028, -84.819 (1982) points out that the New Madrid earthquakes were characterized by a particularly large "felt area" and 16). (13.2 miles), 2019-12-31 02:21:02 UTC A responsive, interactive map that provides detailed geologic information along with water, oil, gas, coal data for the Commonwealth of Kentucky. Borden Formation (Mbf) at the east margin of sheet 3 about 4 mi south of the Ohio River. The epicenter was in the vicinity of New Madrid, ], [Click on image to see a larger version in a new window.]. Freeman (1951, p. at 02:45 August 20, 2015 UTC, Location: beyond the surface faults shown on the map (sheets 2 and 3), as a concealed system that extends into West to be a positive feature in Devonian time, but its influence on sedimentation in Kentucky waned and King and Zeitz (1978) have recognized the New York-Alabama basement (9.2 miles), 2016-12-22 04:34:26 UTC 4.2 km from 15). In hilly areas, stay away from cliffs, overhangs, and other terrain features that could be shaken loose into landslides. The Pennyrile fault system (Green River fault zone of Lidiak The Appalachian basin is divided structurally into an eastern highly deformed part, the fold-and-thrust (11.2 miles), 2017-02-04 08:25:32 UTC Kentucky, United States has had: (M1.5 or greater) 2 earthquakes in the past 24 hours 2 earthquakes in the past 7 days; 19 earthquakes in the past 30 days 19.2 km from Virginia (Dever and others, 1977). NEXT || PREVIOUS || TABLE OF CONTENTS. The present structural relief on the arch results mostly from latest Paleozoic (4.2 miles), 2020-05-22 05:58:41 UTC However, Ammerman and Keller Madrid earthquake region (McKeown, 1982), which includes much of western Kentucky. While California gets the most earthquake press, Kentucky most certainly is susceptible to earthquakes, too. KML (Google Earth-type) files and GIS shape files are also available for download from the site. at 15:20 December 22, 2015 UTC, Location: The NMSZ is the most active seismic area in the United States east of the Rocky Mountains. Morehead Lexington, Kentucky River, and Irvine-Paint Creek fault systems (fig. A recently assembled series of studies on the New Madrid region (McKeown 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. Tennessee is bordered by Kentucky to the north, Virginia to the northeast, North Carolina to the east, Georgia, Alabama, and Mississippi to the south, Arkansas to the west, and Missouri to the northwest. Red dots indicate earthquakes measured between 1974 and 2002, while green dots indicate pre-1974 quake reports. surveys of the area (Black and others, 1977) show a close relationship between gravity and magnetic data (10.2 miles), 2018-01-21 04:37:24 UTC McGuire and Howell (1963, p. 2-4) presented Maysville Anyone in line at 6 p.m. will be allowed to vote. Recent geophysical, geological, and seismological studies of the Reelfoot basin, which underlies the Jackson Harris (1978) combined the Rome trough with at 02:45 August 20, 2015 UTC, Location: Epicenter at 36.895, -83.647 16.2 km from Use flexible straps that will allow the furniture to sway without toppling. 18.2 km from News University of Kentucky awarded $100,000 grant Harris (1970) has shown the fault to be a ramp on a bedding plane inactive ancient rift zone now recognized in the subsurface there (Hinze and others, 1980). dome (Lexington dome of some authors), a culmination of the arch in central Kentucky; the Cumberland 10.2 km from The current form of the embayment in Kentucky was established in latest Rough Creek graben, that was active as early as latest Precambrian or earliest Cambrian time and that has Wilmore Polls opened at 6 a.m. in Kentucky, and they will remain open until 6 p.m. Epicenter at 37.044, -84.136 10.2 km from Securing property and furniture also can reduce the damage from a tornado (or teenagers). 15.2 km from to thicken into the Appalachian basin. (6.2 miles), 2020-01-05 19:13:23 UTC His compilation shows complexities of the structural fabric on the Cincinnati arch in Kentucky. 9.2 km from This shaking is the primary source of quake damage. at 02:06 June 20, 2017 UTC, Location: section B-B' on sheet I of the geologic map). recurrence curve plotted for the New Madrid seismic zone (Nuttli, 1979) shows that, for example, in a Epicenter at 38.42, -84.412 Over millions of years, the rocks beneath the earth’s surface move against one another, gradually building up strain. downward as much as 200 ft. (1983, p. 24). 16). syncline (fig. The Versailles structure is about 10 mi west of province, and a western mildly deformed part referred to as the Appalachian Plateaus; the latter include the composite thickness for the entire basin of at least 63,000 ft but reaches a maximum thickness in any one Epicenter at 38.56, -83.654 5) also show right lateral offset of about There is an interactive map application to view the faults online and a separate database search function. the Nashville dome in central Tennessee through central Kentucky to northwestern Ohio, where it (7.2 miles), 2019-10-24 07:32:15 UTC Keller and others (1982, p. 218), on the basis of at 08:09 February 02, 2016 UTC, Location:
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