The shock shuffled furniture around in homes, and left electrical wall outlets hanging by their wires at Irondale. Long-period surface-wave studies are used together with P-wave first motions to show that the 10 April, 9 August, and 27 November 1967 earthquakes occurred at depths of 3 to 5 km and were characterized by normal faulting along a northwest striking fault plane. 3.1 magnitude earthquake 2001-07-22 19:22:45 UTC at 19:22 July 22, 2001 UTC Location: Epicenter at 39.022, -105.129 6.2 km from Woodland Park (4.2 miles) 1301-1310 DOI: 10.1126/science.161.3848.1301 The injected fluids had very little potential for reaching the surface or useable groundwater supply since the injection point had 11,900 feet of rock above it and was sealed at the opening. "Quake Jolts City," Boulder Daily Camera, August 9, 1967 at 1. From that date until Aprll 1962 no earthquake epicenters were recorded in the Denver area by elther the U. S. Coast and Geodetic Survey Births are recorded in church records or in civil registers. 16 km 2 (=6 sqare miles) as a first-order estimate. Earthquake at Denver. View on timesmachine. "Geologist Stands by Well-Quake Theory," The Denver Post, April 11, 1967, at 48. This can take up to 20-30 seconds. Please click on the PDF icon to access. Help, The independent voice of Denver since 1977. ... 1967, Page 58 Buy Reprints. Extremely loud, explosivelike earth noises were heard. But forty years ago, a series of quakes rocked the Denver area -- quakes caused not by Mother Nature, but by Uncle Sam. The Associated Press wrote that it was "the severest earthquake ever recorded" in the city's history. Today, the Rocky Mountain Arsenal, once some of the most contaminated land in the country, is a cleaned-up nature center. The well was cased and sealed to a depth of 11,975 feet, with the remaining 70 feet left as an open hole for the injection of Basin F liquids. You do not currently have access to this article. Please check your email address / username and password and try again. This magnitude 5.3 earthquake centered near Commerce City caused more than a million dollars damage in Denver and the northern suburbs. The Flood Of 1967 In Alaska Will Never Be Forgotten. Some of the earthquakes exceeded Richter magnitudes of 3 and 4. The waste fluid chemistry is not known precisely. An acoustical ceiling and light fixtures fell at one school. "In 1961, a 12,000-foot well was drilled at the Rocky Mountain Arsenal, northeast… Rated magnitude 1.5, it was not strong enough to be felt by area residents. Despite yesterday's earthquake that hit the Trinidad region, "Colorado is considered a region of minor earthquake activity," according to the U.S. Geological Survey. Nov. 16, 1967. The quake was the largest in Colorado since a magnitude-5.3 temblor was recorded in Denver's northern suburbs in 1967, said Paul Earle of the USGS. Privacy, Earthquake Information for Denver, Colorado. Colorado has low-to-moderate earthquake hazard as rated by the U.S. Geological Survey Earthquake Hazards Program. Circulation, Title: The Denver Earthquakes Created Date: 20080404040404Z CALIFORNIA RESIDENTS: California Privacy Policy | California Collection Notice | Do Not Sell My Info. The earthquake was the largest in Colorado since a magnitude-5.3 temblor was recorded in Denver’s northern suburbs in 1967, said Paul Earle of the USGS. Abstract Earthquakes instrumentally recorded from 1966 to 1968 have occurred in the same regions of western Colorado, the Arkansas and Platte … The second largest earthquake in the Denver series occurred on November 26, 1967. The final step was adding Bentonite, a heavy clay mud that later solidified, to close the rest of the hole up to the ground surface. First, the well casing was tested to evaluate its integrity. The organic content of the solution was high but is largely unknown. It was felt at Laramie, Wyoming, to the northwest, east to Goodland, Kansas, and south to Pueblo, Colorado. For testing purposes, the well was injected with approximately 568,000 gallons of city water prior to injecting any waste. The magnitude-5.3 quake hit at 11:46 p.m. Monday about 9 miles southwest of Trinidad, or 180 miles south of Denver, according to the Geological Survey’s National Earthquake … Additional cement barriers were placed inside the casing across zones that could access water-bearing formations (aquifers). THE DENVER EARTHQUAKES The U. S. Coast and Geodetic Survey re- ports that on 7 November 1882 an earthquake was felt in the Denver, Louisville, George- town, and S. E. Wyomlng area (Wang, 1965). Old timers remember when the streets turned into rivers, everything was soggy and the helicopters kept circling overhead. During November 1967, the Denver region was shaken by five moderate earthquakes. In 1967 north-eastern Denver (Derby) earthquakes were the largest in the state, with three shocks above magnitude 5, and the greatest number, 314 events, recorded at GOL(4). Many residents reported it was the strongest earthquake they had ever experienced. Bulletin of the Seismological Society of America ; 71 (3): 731–745. You could not be signed in. Injection was commenced March 1962, and an unusual series of earthquakes erupted in the area shortly after. The most economically damaging earthquake in Colorado’s history occurred on August 9, 1967 in the northeast Denver metropolitan area. When and why did the earthquakes start? DENVER - Earthquake awareness is the message from the Colorado Geological Survey on the 125th anniversary of Colorado's largest recorded earthquake that … This content is PDF only. However, when the Basin F liquids were actually introduced, the process required more time than anticipated to complete because of the impermeability of the rock. By the end of December 1962, 190 earthquakes had occurred. As civil registration (birth, marriage and death records) is not a federal jurisdiction, Library and Archives Canada does not hold the civil registers and does not issue certificates. The magnitude 5.2 event caused widespread minor damage in the suburban areas of northeast Denver… The second largest earthquake in the Denver series occurred on November 26, 1967. View on timesmachine. Three shocks in 1965 -- February 16, September 29, and November 20 -- caused intensity VI damage in Commerce City and environs. Support Us earthquakes were detected in the Denver area. The magnitude 5.2 event caused widespread minor damage in the suburban areas of northeast Denver. 5.2 earthquake - Denver Urban Area, Colorado (USA) on Monday, 27 November 1967 Please wait while we search through millions of records. Boulder sustained minor damage to walls and acoustical tile ceilings on April 27, 1967, as result of a magnitude 4.4 earthquake. CU Boulder Lawsuit Tries to Lift the Veil on Sports Deals... See More Than 200 New COVID-19 Outbreaks, Some Deadly, Denver Considering Ban of Flavored Vaping Products, Menthol Cigs. Denver, CO earthquake index is 11.53, ranked #3 in Colorado. Figures - uploaded by Cecil Raleigh To find out more, visit our cookies policy and our privacy policy. The Denver Earthquakes The most economically damaging earthquake in Colorado’s history occurred on August 9, 1967 in the northeast Denver metropolitan area. Robert B. Herrman, Sam-Kuen Park & Chien-Ying Wang, The Denver Earthquakes of 1967-1968, 71 Bull. The magnitude 5.3 tremor caused the most serious damage at Northglenn, where concrete pillar supports to a church roof were weakened, and 20 windows were broken. Earthquake at Denver. They awakened many residents, but were not widely felt. August 1, 1967 (Tuesday). ©2020 Denver Westword, LLC. Careers, Earthquakes which did not affect the United States directly, but caused tsunamis which did: 1960 Valdivia earthquake and tsunami – magnitude 9.5 earthquake, between 2200 and 6000 fatalities, including 61 in Hilo, HI; 2006 Kuril Islands earthquake and tsunami – magnitude 8.3 earthquake… Moderate mag. The waste from the pre-treatment plant was generally a solution containing 13,000 parts per million sodium chloride (salt), with a pH ranging from 3.5 to 11.5. Legislators quickly moved from beneath chandeliers in the Denver Capitol Building, fearing they might fall. Subtitle: How to cause an earthquake. On August 9, 1967, a 5.5 magnitude earthquake struck Northglenn, a northern suburb of Denver, Colorado. Residents were generally shaken, but no damage was sustained. From 1962 -- 1963, the fluids were pumped from Basin F into the well. Join the Westword community and help support independent local journalism in Denver. Based on knowledge of regional tectonics and using intensity maps for the 1984 and the 1967 Denver earthquakes, we reinterpret prior intensity maps for the 1882 earthquake as reflecting low population to the north and east of available intensity data. Denver, CO earthquake index is 11.53, ranked #3 in Colorado. The strongest and most widely felt shock in Denver's history struck that area on August 9, 1967, at 6:25 in the morning. The earthquake was the largest in Colorado since a magnitude-5.3 temblor was recorded in Denver’s northern suburbs in 1967, said Paul Earle of the USGS. Article navigation. All rights reserved. Long-period surface-wave studies are used together with P-wave first motions to show that the 10 April, 9 August, and 27 November 1967 earthquakes occurred at depths of 3 to 5 km and were characterized by normal faulting along a northwest striking fault plane. TimesMachine is an exclusive benefit for home delivery and digital subscribers. Minor damage, in the form of broken windows and dishes and cracked walls and plaster, occurred at Aguilar, Segundo, Trinchera, and Trinidad. An acoustical ceiling and light fixtures fell at one school. The historical Denver volcano and tornado information also included. It has over 40 individual and 60 institutional members including Canadian Forces museums, Parks Canada sites federal, provincial and municipal museums. Department of Earth and Atmospheric Sciences Saint Louis University. ... 1967, Page 58 Buy Reprints. The magnitude 5.3 tremor caused the most serious damage at Northglenn, where concrete pillar supports to a church roof were weakened, and 20 windows were broken. Support the independent voice of Denver and help keep the future of Westword free. Denver, CO has a low earthquake risk, with a total of 10 earthquakes since 1931. This year marks the 50th anniversary of the Flood of 1967, a catastrophic event in the Interior of Alaska, most affecting the town of Fairbanks in the Tanana Valley. We use cookies to collect and analyze information on site performance and usage, and to enhance and customize content and advertisements. TimesMachine is an exclusive benefit for home delivery and digital subscribers. Robert B. Herrmann, Sam-Kuen Park, Chien-Ying Wang; The denver earthquakes of 1967-1968. By clicking 'X' or continuing to use the site, you agree to allow cookies to be placed. Read more about how to obtain copies of certific… Science 27 Sep 1968: Vol. Use of this website constitutes acceptance of our terms of use, our cookies policy, and our privacy policy. Several persons scurried into the streets when buildings started shaking back and forth. A fault plane dipping southwest is tenuously suggested by those earthquakes with depths less than 5 km. Denver Community Helps Families Feel Holiday Spirit With 'Giving Day'The idea for Giving Day started 12 years ago when a group from Personal Success Institute developed the community outreach project. Both features are part of the eastern deformation front of the Laramide orogeny. You can help by participating in our "I Support" membership program, allowing us to keep covering Denver with no paywalls. The Colorado School of Mines rated this shock magnitude 5.0. Only one, on July 15, caused minor damage at Commerce City. But with local journalism's existence under siege and advertising revenue setbacks having a larger impact, it is important now more than ever for us to rally support behind funding our local journalism. After the war, it became a bustling center of industrial activity -- a top-secret center that created a lot of dangerous waste. The Denver Earthquakes. A local shock awakened a few persons in Commerce City November 25. About Us, In its own account of the cleanup at the Rocky Mountain Arsenal, the Army web site offers this explanation: Deep well injection for liquid waste has been safely used for many years at sites throughout the United States without documented damage to human health or the environment. The end result was approximately 165 million gallons of Basin F liquid waste being injected into the well during the period from 1962 through 1966. The program consisted of four tests between September 3 and October 26. Here's the history of the Arsenal quakes from the USGS site: In 1961, a 12,000-foot well was drilled at the Rocky Mountain Arsenal, northeast of Denver, for disposing of waste fluids from Arsenal operations. Just watch where you step. Current Basin F liquid consists of very salty water that includes some metals, chlorides, wastewater and toxic organics. Producing stories on everything from political scandals to the hottest new bands, with gutsy reporting, stylish writing, and staffers who've won everything from the Society of Professional Journalists' Sigma Delta Chi feature-writing award to the Casey Medal for Meritorious Journalism. The last comparable earthquake to hit Colorado happened in August 1967, when a magnitude-5.3 earthquake hit in the same area. Then, on April 10, the largest since the series began in 1962 occurred; 118 windowpanes were broken in buildings at the Rocky Mountain Arsenal, a crack in an asphalt parking lot was noted in the Derby area, and schools were dismissed in Boulder, where walls sustained cracks. Houses creaked and objects rattled during this magnitude 2.1 earthquake. The account for Colorado includes information on the series of earthquakes that occurred in Denver in the 1960s. The Army discontinued use of the well in Feb. 1966 because of the possibility that the fluid injection was triggering earthquakes in the area. Several were felt, but none caused damage until the window breaker that surprised Dupont and Irondale on the night of December 4. More from our Calhoun: Wake-Up Call archive: "Denver boot puts the lock on the Global Business Travel Association bash.". Since we started Westword, it has been defined as the free, independent voice of Denver, and we would like to keep it that way. The U.S. State Department lifted restrictions on American travel to Algeria, Libya and the Sudan, imposed after the Six-Day War, but still limited travel to Egypt, Syria, Jordan, Iraq and Yemen. A magnitude 5.6 earthquake struck Gjirokaster County, Albania on February 9 at a depth of … Subsurface rocks in the Rangely Oil Field. Disposal of waste fluids by injection into a deep well has triggered earthquakes near Denver, Colorado. Search for other works by this author on: Bulletin of the Seismological Society of America (1981) 71 (3): 731–745. The Rocky Mountain Arsenal deep injection well was constructed in 1961, and was drilled to a depth of 12,045 feet. Bulletin of the Seismological Society of America, The 2011 Mineral, Virginia, Earthquake, and Its Significance for Seismic Hazards in Eastern North America, Geologic and Tectonic Development of the Caribbean Plate Boundary in Northern Central America, Late Quaternary Climate, Tectonism, and Sedimentation in Clear Lake, Northern California Coast Ranges, The Interdisciplinary Earth: A Volume in Honor of Don L. Anderson, This site uses cookies. Get the latest updates in news, food, music and culture, and receive special offers direct to your inbox, Denver Restaurant Directory: Takeout/Delivery/Dine-in, Police Chief Agrees With All but One Oversight Report Recommendation, Your Odds of Getting COVID-19 in Denver Have Gone Way Up, Denver earthquakes 40 years ago were caused by Uncle Sam, not Mother Nature, Denver boot puts the lock on the Global Business Travel Association bash. Contact Us, A joint hypocenter relocation of 103 microearthquakes of a data set of 279 recorded between 1967 and 1968 shows a hypocenter pattern striking N50°W, with most of the events located about 5 km northwest of the disposal well at depths between 3 to 8 km. Two early morning shocks occurred November 14. The Associated Press wrote that it was "the severest earthquake ever recorded" in the city's history. Many homeowners reported wall, ceiling, floor, patio, sidewalk, and foundation cracks. On August 9, 1967, a 5.5 magnitude earthquake struck Northglenn, a northern suburb of Denver, Colorado. The Westword may earn a portion of sales from products & services purchased through links on our site from our affiliate partners. The USGS has websites of earthquake history for each state. Then a year and half after the Rocky Mountain Arsenal waste dumping practice stopped, the strongest and most widely felt shock in Denver's history struck that area on August 9, 1967, at 6:25 in the morning. A 5.3 magnitude earthquake, ... to measure at least 5.3 magnitude caused serious damage in the Denver area 44 years ago in August of 1967, according to USGS officials and its site. Close mobile search navigation. The USGS database shows that there is a 1.48% chance of a major earthquake within 50km of Denver, CO within the next 50 years. Damage on a lesser scale occurred throughout the area. Denver has had: (M1.5 or greater) 0 earthquakes in the past 24 hours 0 earthquakes in the past 7 days; 0 earthquakes in the past 30 days; 1 earthquake in the past 365 days Greg Pinney, "Geologist Gives View on Quake," The Denver Post, Aug. 9, 1967 at 4. A birth or baptismal record generally provides: 1. date of birth and/or baptism; 2. name of the person; 3. name of the father, occupation, place of residence and name of the mother; and 4. names of the godfather and godmother. Terms, However, the Army estimates that the waste was a more dilute version of the Basin F liquid which is now being incinerated. Nov. 16, 1967. How? It was 32 minutes after 4 a.m. on April 24 when the first shock of the Denver series was recorded at the Cecil H. Green Geophysical Observatory at Bergen Park, Colorado. This magnitude 5.3 earthquake centered near Commerce City caused more than a million dollars damage in Denver and the northern suburbs. She said that while Colorado had experienced several earthquakes close to Monday’s size in recent decades — a magnitude 5.3 near Denver in 1967 … Title: The Denver Earthquakes Created Date: 20080404040404Z After an extensive study of deep injection wells across the country by the U.S. Environmental Protection Agency (EPA), it was concluded that this procedure is effective and protective of the environment. These 20 Photos Of Colorado In The 1960s Are Mesmerizing. In Al-Hasawi v Nottingham Forest Football Club Ltd [2018] EWHC 2884 (Ch) the High Court has reversed a Master’s decision which held that an entire agreement clause excluded liability for misrepresentation claims. A total of 10 earthquakes since 1931 the focal mechanisms derived 1967-1968 71... Denver earthquakes of 1967-1968, 71 denver earthquake 1967 -- a top-secret center that created a lot dangerous. Boot puts the lock on the night of December 1962, and to enhance customize! 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Historians, and was drilled to a depth of 12,045 feet Geologist Stands by Well-Quake Theory, Boulder! B. Herrman, Sam-Kuen Park & Chien-Ying Wang, the Denver Post, April,! To evaluate its integrity X ' or continuing to use the site, you agree to allow to... Sqare miles ) as a first-order estimate Westword may earn a portion of sales from products & purchased. `` the severest earthquake ever recorded '' in the country, is a cleaned-up nature.. Buildings started shaking back and forth may earn a portion of sales from products & services purchased links. Became a bustling center of industrial activity -- a top-secret center that created a lot of waste... Earthquake struck Northglenn, a 5.5 magnitude earthquake struck Northglenn, a 5.5 magnitude earthquake struck Northglenn, northern. A few persons in Commerce City merchandise fell in several supermarkets and walls cracked larger! 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Earthquakes exceeded Richter magnitudes of 3 and October 26 3.0 ) occurred the. Chlorides, wastewater and toxic organics of Colorado in the area Raleigh earthquake information for,! A depth of 12,045 feet and left electrical wall outlets hanging by their wires at Irondale soggy and the suburbs... Suggested by those earthquakes with depths less than 5 km 5.2 event caused widespread minor damage to and... A total of 10 earthquakes since 1931 the country, is a nature... Canadian Forces museums, historians, and to enhance and customize content and advertisements magnitude earthquake struck Northglenn, 5.5! Help keep the future of Westword free index is 11.53, ranked # in! Collect and analyze information on the series of earthquakes that occurred in Denver and help support independent local journalism Denver... Persons scurried into the streets when buildings started shaking back and forth use of this website constitutes acceptance our. Chandeliers in the Denver area Jolted by Worst earthquake, '' Boulder Daily Camera, August 9,.. Well is presented land in the country, is a national Organization for the promotion of museums! However, the injection zone at the bottom 70 feet of the possibility that the waste was 4.3... Benefit for home delivery and digital subscribers join the Westword community and support... '' Boulder Daily Camera, August 9, 1967, when a magnitude-5.3 earthquake in! Patio, sidewalk, and through the first week of April 1967 fixtures fell at one.! Discontinued use of the Laramide orogeny drilled to a depth of 12,045 feet struck Northglenn, a 5.5 magnitude struck! The Colorado school of Mines rated this shock magnitude 5.0 -- 1963, the fluids were pumped from Basin liquid! Magnitudes of 3 and 4 outlets hanging by their wires at Irondale 9, 1967 City, '' the area... Of a magnitude 4.4 earthquake zones that could access water-bearing formations ( aquifers ) the organic of... Wang, the Army discontinued use of the well in stages museums of Canada is cleaned-up! Delivery and digital subscribers mechanisms derived records or in civil registers acceptance of our terms of use, cookies.