[Reprinted in Engineering Case Histories No. However, the advent of hundreds of earthquakes in the area of northeastern Denver … 0000001867 00000 n The Rocky Mountain Arsenal Earthquakes During the spring of 1962 seismological stations in Colorado began recording a number of small earthquakes near Denver. The first inklings of the connection came in the early 1960s from Colorado’s Rocky Mountain Arsenal (RMA). Injection was commenced March 1962, and an unusual series of earthquakes erupted in the area shortly after. Earthquakes reported in this study were of magnitude z 1.0; most were greater than magnitude 2.0, with the exception of the Denver events. 0000009034 00000 n After that a series of earthquakes occurred. The Mountain Geologist v.3, 1966 © 2005 The Rocky Mountain Association of Geologists PRESSURE INJECTION AND EARTHQUAKE FREQUENCY Pressure injection began in March 1962. The vast majority of these earthquakes, which did not result in fatalities, were caused by various forms of collapse associated with the redistribution of subsurface stress related to mining activities, ac… The largest and most widely known resulted from fluid injection at the Rocky Mountain Arsenal near Denver, Colorado. A global summary report that tabulates losses based on the stated scenario conditions; The PDF files may be navigated using the built-in bookmarks feature that may be seen to the left of an Adobe Acrobat (Reader) window. As such, the USGS has been focusing extensively on that area, especially since the big M5.3 Raton Basin earthquake in 2011. Colorado has a long history of induced earthquakes, going back to the first study in the 1960s at the Rocky Mountain Arsenal. This signup is not the same as your CGS Publications login. 0000002425 00000 n This first happened at the Rocky Mountain Arsenal, a nuclear weapons facility outside of Denver. In 1967, an earthquake of magnitude 5.5 followed a series of smaller earthquakes. %PDF-1.6 %���� Retrieved on 21 August 2009. Therefore, there may be significant differences between the modeled results contained in this report and the actual social and economic losses following a specific earthquake. 0000001957 00000 n the Rocky Mountain Arsenal Disposal Well By D. B. Hoover and J. In 1967, an earthquake of magnitude 5.5 followed a series of smaller earthquakes. from the Rocky Mountain Arsenal. Injection had been discontinued at the site in the previous year once the link between the fluid injection and the earlier series of earthquakes was established. The August 2011 M 5.3 event is the second-largest earthquake to date for which there is clear evidence that the earthquake sequence was induced by fluid injection. Locations of the park’s known, approximate, and concealed faults are shown in Figure 2. Golden, CO: Colorado Geological Survey, 2006. https://coloradogeologicalsurvey.org/publications/hazus-report-rocky-mountain-arsenal. In 1967, an earthquake of magnitude 5.5 followed a series of smaller earthquakes. Underground carbon dioxide storage likely would cause earthquakes ... where the Army was injecting waste deep into a well at its Rocky Mountain Arsenal. G.R. Den-897 Colorado is considered a region of minor seismicity. Earthquakes at the Rocky Mountain Arsenal, 1962–1966 Justin Whitney Summary Between 1962 and 1967, the Denver Metropolitan Area (DMA) experienced over 1,500 earthquakes. Keranen et al. Earthquakes reported in this study were of magnitude z 1.0; most were greater than magnitude 2.0, with the exception of the Denver events. See Summary of Databases for full HAZUS database information. Retrieved on 21 August 2009. 0000001741 00000 n Department of the Army, Summary History of Rocky Mountain Arsenal, (manuscript-- available at the Western History Collection, Denver Public Library) (1967-1980) David M. Evans, The Denver Area Earthquakes and the Rocky Mountain Arsenal Disposal Well, 3 The Mountain Geologist 23 (1966). 0000002334 00000 n Rocky Mountain Arsenal, Remediation Venture Office (RVO). xref The first two earthquakes w~th epicenters in the Arsenal area were recorded during April 1962. However, the earthquakes did not stop, continuing at a rate of “from 4 to 71 per month”. Geophys. startxref 0000220066 00000 n At 5.7 magnitude, the Prague earthquake was about 10 times stronger than the previous record holder: a magnitude-4.8 Rocky Mountain Arsenal earthquake … 0000002610 00000 n free, “HA-84 HAZUS 2005: Rocky Mountain Arsenal Fault Earthquake Event Report.” Earthquake Simulation. ↑ USGS Colorado Earthquake History. The first inklings of the connection came in the early s from Colorado’s Rocky Mountain Arsenal (RMA). According to the Colorado Geological Survey (CGS), a lone 4.8 magnitude earthquake, on 9 August 1967 cost over 1 million U.S. dollars in property damages. ↑ John Daly, "U.S. Government Confirms Link Between Earthquakes and Hydraulic Fracturing," Oil Drum, July 8, 2011. Heerschap, Lauren, and Matthew L. Morgan. The Rocky Mountain Arsenal near Denver, Colorado was the site of some the most damaging induced earthquakes in the United States. A text abstract of this article is not available. �S�"v6��� Z��a�F��b6_i��ȼ�Eߘ;�|=#i����7�O��Ө�[� �����;����[���vK���p4��Lz�3ˬHD��1)��_��hi���|9'K��zu����Q�fe�'ų3uX��;@��!��`�2a"jP%fP� �`p�2�`z�Ќc�ɨ��dTàb�" �|@Z������Iq� � V��x�0�1�9`����ـ�. Josephus' narrative. United States Army Rocky Mountain Arsenal, Colorado, April 24, 1962 – The first of a decade-long series of earthquakes ruptures the ground miles beneath the state of Colorado. (A new plot … In February 1966, injecting wastewater fluid into the well at Rocky Mountain Arsenal was stopped, because of the suggested link to the earthquakes in the area. x�b```f``)b`e`h�� Ā B@1v�0�7|�N4�00p>�8��er�Sړ%w��\����q(��1�4�������L���3�2n�R�q�J嚦�prq��)�L 6550 Gateway RoadCommerce City, CO 80022From I-70 exit at Quebec Street and go north. A set of worst-case scenarios replicating events of maximum intensity based on particular known historical earthquakes or faults. In 1967, an earthquake of magnitude 5.5 followed a series of smaller earthquakes. Injection had been discontinued at the site in the previous year once the link between the fluid injection and the earlier series of earthquakes was established. Ben F. Rummerfield, A. Peter Olsons and D. B. Hoover, Seismic Survey in the Region of Recent Earthquake Activity … The Rocky Mountain area has had earthquakes over the years; however, they are normally spread out over long periods of time. Home > Browse Collections > Rocky Mountain Association of Geologists > Sub-Collection The Mountain Geologist > Year 1966. 0000004387 00000 n 0000218614 00000 n Rocky Mountain Arsenal, south entrance. The largest and most widely known resulted from fluid injection at the Rocky Mountain Arsenal near Denver, Colorado. Geological Survey, Reston, Virginia 22092 Injection of fluid wastes into the fractured Preqambfian crystalline bedrock beneath the Rocky Moun- tain Arsenal near Denver triggered earthquakes in the 1960's. The Army decided to borrow a technique that the oil industry had been using since the 1930s to get rid of the excess water it produced as a byproduct of oil and gas extraction. Abstract View the First Page. 0000009545 00000 n Seismometers and seismologists in Denver are equally shaken: Colorado is a relatively calm area, tectonically speaking. 0000006176 00000 n 0000008123 00000 n The simulations are based on either the Western US (WUS) or Central and Eastern US (CEUS) attenuation functions (see the USGS, A global summary report that tabulates losses based on the stated scenario conditions. Travel approximately 2.8 miles to Prairie Parkway/64th Avenue. Get this from a library! In the general earthquake model, the probabilistic ground motion and earthquake faults are developed from data supplied by the U.S. Geological Survey in Golden, Colorado. He referenced the oft-cited Rocky Mountain Arsenal situation in which the federal government injected toxic waste deep underground in the 1960s near Denver. But another important takeaway from this is this earthquake – this largest earthquake happened over a year after they stopped injection. Earthquakes were … Since the start of fluid injection, 710 Denver-area earthquakes have been recorded. These will include notices for new blog entries, new publications, and the occasional geoscience event or news item of note. After that a series of earthquakes occurred. (A new plot … The largest and most widely known resulted from fluid injection at the Rocky Mountain Arsenal near Denver, Colorado. After decades of a low background incidence of earthquakes, a . (photo 1960) The Rocky Mountain Arsenal was a United States chemical weapons manufacturing center located in the Denver Metropolitan Area in Commerce City, Colorado.The site was operated by the United States Army throughout the later 20th century and was controversial among local residents until its closure in 1992. The well is bottomed in 75 ft of highly fractured Precambrian gneiss. During 1961, a deep well was drilled at the Rocky Mt. 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. This all changed with the new deep well at Rocky Mountain Arsenal. But another important takeaway from this is this earthquake – this largest earthquake happened over a year after they stopped injection. believed to arise from fluid pressure increase (Van Poollen and Hoover 1970). It has been recognized since the 1960’s that human activities can cause earthquakes. fault, HA-84D. Arsenal northeast of Denver, CO, to dispose of contaminated waste water. statewide, (Nicholson, Craig and Wesson, … It decided to inject the worst of its toxic chemical waste being stored at the Rocky Mountain Arsenal in Commerce City deep into the Earth as a means of permanent storage. Back in the 1960s a 12,000 foot injection well was drilled at the Rocky Mountain Arsenal. 137 0 obj <>stream In 1962, crews at the Rocky Mountain Arsenal, a now-defunct chemical weapons plant just north of Denver, began injecting liquid waste down a well that penetrated more than two miles of earth. … In 1967, an earthquake of magnitude 5.5 followed a series of smaller earthquakes. On a smaller scale the US army's Rocky Mountain arsenal near Denver Colorado was considered to be in a geologically stable region until the early 1960s. <]>> According to the December 19, 1965, Denver Post, "Deep well pumping at Rocky Mountain Arsenal [may] be responsible for the Denver area earthquakes..." A theory supported by many of the nation's geologists held that the fluids being pumped into the ground via the Pressure Injection Disposal Well since 1962 acted as a lubricant, allowing large blocks of stone beneath the earth to shift more easily. 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