The 1960s were a time full of big changes (the British Invasion, Moon landing and Flower Power) and unrest (Cuban Missile Crisis, President Kennedy’s assassination and the Vietnam War) in the United States. Over 1,300 earthquakes were recorded at Bergen Park between January 1963 and August 9, 1967. Title: The Denver Earthquakes Created Date: 20080404040404Z Robert B. Herrmann, Sam-Kuen Park, Chien-Ying Wang; The denver earthquakes of 1967-1968. Damage on a lesser scale occurred throughout the area. Moderate mag. Both features are part of the eastern deformation front of the Laramide orogeny. This magnitude 5.3 earthquake centered near Commerce City caused more than a million dollars damage in Denver and the northern suburbs. Abstract Earthquakes instrumentally recorded from 1966 to 1968 have occurred in the same regions of western Colorado, the Arkansas and Platte … Support the independent voice of Denver and help keep the future of Westword free. In November 1965, David Evans, a Denver geologist, pub- 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. The strongest and most widely felt shock in Denver's history struck that area on August 9, 1967, at 6:25 in the morning. 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. "Quake Jolts City," Boulder Daily Camera, August 9, 1967 at 1. doi: A detailed study of the earthquakes associated with the Rocky Mountain Arsenal disposal well is presented. However, the Army estimates that the waste was a more dilute version of the Basin F liquid which is now being incinerated. These 20 Photos Of Colorado In The 1960s Are Mesmerizing. TimesMachine is an exclusive benefit for home delivery and digital subscribers. Denver, CO earthquake index is 11.53, ranked #3 in Colorado. The Denver Earthquakes The most economically damaging earthquake in Colorado’s history occurred on August 9, 1967 in the northeast Denver metropolitan area. Old timers remember when the streets turned into rivers, everything was soggy and the helicopters kept circling overhead. 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. Some of the earthquakes exceeded Richter magnitudes of 3 and 4. Several persons scurried into the streets when buildings started shaking back and forth. Help, The independent voice of Denver since 1977. 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 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. 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. 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. Close mobile search navigation. Residents were generally shaken, but no damage was sustained. This magnitude 5.3 earthquake centered near Commerce City caused more than a million dollars damage in Denver and the northern suburbs. Just watch where you step. This content is PDF only. Careers, Marilyn Robinson, "Denver Area Jolted by Worst Earthquake," The Denver Post, August 9, 1967 at 1 & 3. Read more about how to obtain copies of certific… Earthquake at Denver. 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… Minor damage, in the form of broken windows and dishes and cracked walls and plaster, occurred at Aguilar, Segundo, Trinchera, and Trinidad. The well remained unused for nearly 20 years. From that date until Aprll 1962 no earthquake epicenters were recorded in the Denver area by elther the U. S. Coast and Geodetic Survey Many slight shocks occurred near the well during this period. The Army was dumping dangerous chemicals into a deep injection well out at the Rocky Mountain Arsenal. Terms, Slighter rumblings (below magnitude 3.0) occurred throughout the remainder of 1966, and through the first week of April 1967. Denver, CO earthquake index is 11.53, ranked #3 in Colorado. Several reported basement floors separated from walls. An acoustical ceiling and light fixtures fell at one school. earthquakes were detected in the Denver area. The waste fluid chemistry is not known precisely. Nov. 16, 1967. You do not currently have access to this article. During November 1967, the Denver region was shaken by five moderate earthquakes. On August 9, 1967, a 5.5 magnitude earthquake struck Northglenn, a northern suburb of Denver, Colorado. In 1985 the Army permanently sealed the disposal well in stages. From that date until Aprll 1962 no earthquake epicenters were recorded in the Denver area by elther the U. S. Coast and Geodetic Survey Another strong shock rumbled through the Denver area on November 14, 1966, causing some damage at Commerce City and Eastlake. The Rocky Mountain Arsenal deep injection well was constructed in 1961, and was drilled to a depth of 12,045 feet. The shock shuffled furniture around in homes, and left electrical wall outlets hanging by their wires at Irondale. The most economically damaging earthquake in Colorado’s history occurred on August 9, 1967 in the northeast Denver metropolitan area. 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. The Rocky Mountain Arsenal was created out of farmland on the eastern edge of metro Denver during World War II to arm the U.S. Army. Building foundations cracked, windows broke, bricks flew off of downtown rooftops. Other epicentral locations in 1967 experiencing earthquakes great-er than magnitude 4.0 were Dulce, Montrose, Silverton, and Pueblo. 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. 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. Figures - uploaded by Cecil Raleigh 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. The Westword may earn a portion of sales from products & services purchased through links on our site from our affiliate partners. Science 27 Sep 1968: Vol. 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. The magnitude 5.2 event caused widespread minor damage in the suburban areas of northeast Denver. Legislators quickly moved from beneath chandeliers in the Denver Capitol Building, fearing they might fall. 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 … Current Basin F liquid consists of very salty water that includes some metals, chlorides, wastewater and toxic organics. At Commerce City merchandise fell in several supermarkets and walls cracked in larger buildings. The Denver Earthquakes. 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 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. 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. Many homeowners reported wall, ceiling, floor, patio, sidewalk, and foundation cracks. You can help by participating in our "I Support" membership program, allowing us to keep covering Denver with no paywalls. Since we started Westword, it has been defined as the free, independent voice of Denver, and we would like to keep it that way. An acoustical ceiling and light fixtures fell at one school. The second largest earthquake in the Denver series occurred on November 26, 1967. First, the well casing was tested to evaluate its integrity. Subtitle: How to cause an earthquake. Use of this website constitutes acceptance of our terms of use, our cookies policy, and our privacy policy. The magnitude 5.2 event caused widespread minor damage in the suburban areas of northeast Denver… Extremely loud, explosivelike earth noises were heard. 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. The largest earthquake within 30 miles of Denver, CO was a 4.3 Magnitude in 1981. Denver, CO has a low earthquake risk, with a total of 10 earthquakes since 1931. 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. Offering our readers free access to incisive coverage of local news, food and culture. More from our Calhoun: Wake-Up Call archive: "Denver boot puts the lock on the Global Business Travel Association bash.". A fault plane dipping southwest is tenuously suggested by those earthquakes with depths less than 5 km. The organic content of the solution was high but is largely unknown. All rights reserved. The OMMC was established in 1967 by a group of military museums, historians, and military history enthusiasts. "In 1961, a 12,000-foot well was drilled at the Rocky Mountain Arsenal, northeast… From 1962 -- 1963, the fluids were pumped from Basin F into the well. The High Court held that the entire agreement clause was not effective in excluding misrepresentation claims and the parties had not separately agreed any such exclusion. Boulder sustained minor damage to walls and acoustical tile ceilings on April 27, 1967, as result of a magnitude 4.4 earthquake. After the war, it became a bustling center of industrial activity -- a top-secret center that created a lot of dangerous waste. 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. 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. CALIFORNIA RESIDENTS: California Privacy Policy | California Collection Notice | Do Not Sell My Info. Nov. 16, 1967. Title: The Denver Earthquakes Created Date: 20080404040404Z You could not be signed in. Additional cement barriers were placed inside the casing across zones that could access water-bearing formations (aquifers). ... 1967, Page 58 Buy Reprints. It has over 40 individual and 60 institutional members including Canadian Forces museums, Parks Canada sites federal, provincial and municipal museums. Any detected voids behind the casing were cemented to prevent possible contamination of other formations. Article navigation. 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. Several were felt, but none caused damage until the window breaker that surprised Dupont and Irondale on the night of December 4. Rated magnitude 1.5, it was not strong enough to be felt by area residents. Disposal of waste fluids by injection into a deep well has triggered earthquakes near Denver, Colorado. Department of Earth and Atmospheric Sciences Saint Louis University. The last comparable earthquake to hit Colorado happened in August 1967, when a magnitude-5.3 earthquake hit in the same area. The historical Denver volcano and tornado information also included. 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. 1301-1310 DOI: 10.1126/science.161.3848.1301 Earthquake Information for Denver, Colorado. 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. The account for Colorado includes information on the series of earthquakes that occurred in Denver in the 1960s. 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. Robert B. Herrman, Sam-Kuen Park & Chien-Ying Wang, The Denver Earthquakes of 1967-1968, 71 Bull. Please check your email address / username and password and try again. Join the Westword community and help support independent local journalism in Denver. Today, the Rocky Mountain Arsenal, once some of the most contaminated land in the country, is a cleaned-up nature center. But forty years ago, a series of quakes rocked the Denver area -- quakes caused not by Mother Nature, but by Uncle Sam. Staff, 16 km 2 (=6 sqare miles) as a first-order estimate. Bulletin of the Seismological Society of America ; 71 (3): 731–745. A joint hypocenter relocation of 103 microearthquakes of a data set of 279 recorded between 1967 and 1968 shows a hypocenter pattern … They awakened many residents, but were not widely felt. Volume 39, Number 1-2 In September of that year, the Army began removing fluid from the Arsenal well at a very slow rate, in hope that earthquake activity would lessen. 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