民間防衛>米国動画・音声
Project Milrow (1969)
アラスカ州アリューシャン列島のAmchitka Islandの核実験は3つで、いずれも地下核実験である。
1964年3月28日のアラスカ地震の津波で124名が死亡したことにより、島嶼での核実験が津波を起こすのではないかという不安がアラスカ州の人々にあった。このこともあり、1969年に米国原子力委員会は、大規模核実験のフィージビリティを確認するProject Milrowを実施した。
[ The Amchitka Program (Declassified U.S. Nuclear Test Film #38) ]
Transacript
0:29 Amchitka Island, far out in the Aleutian island chain of alaska, was the scene on October 2nd 1969 at 12:06 p.m. Bering Daylight Time, where the United States Atomic Energy Commission detonated the Project Milrow nuclear explosive.
0:53 The nuclear explosive device, buried 4,000 feet beneath the surface of the island, at a yield of about one megaton, or approximately the same as some of the largest underground nuclear test in Nevada.
1;10 Role was a calibration test.
1:12 Its effects were measured to determine if larger in nuclear devices could be detonated safely at this remote island.
1;20 Results showed that it is safe to conduct larger test, and one is tentatively scheduled for the fall of 1971.
1:28 This test is called Cannikin.
1:36 The primary testing location for the atomic energy commission, is in the vast areas of the Nevada Test Site, where contained underground nuclear tests have been conducted since 1957, to aid in the development advanced weapons.
1:53 As national defense requirements developed, it became apparent that the Nevada Test Site within about 100 miles of Las Vegas could not be used for some necessary higher yield test, because a possible damage outside structures from ground motion.
2:08 Many new remote areas were examined.
2:14 Martin Basins in Wyoming, remote grazing lands of New Mexico and forward section of Alaska.
2:22 After careful consideration, 3 potential supplemental test areas were identified.
2:30 They are Hot Creek Valley of central Nevada about 90 miles north of present test site, the North Slope of the Brooks Range in Alaska, well beyond the Arctic Circle, and Amchitka Island, far from the Alaskan mainland, in the Aleutian chain.
2:55 Amchitka was selected as having a potential for development, as a location for higher yeild test, nearly 1400 miles from Anchorage, and 2600 miles from Seattle .
3:07 It is isolated from any populated areas.
3:09 The closest person live about 200 miles away at military bases on the islands Adak and Shemya.
3:20 Amchitka is located at about the same latitude as London England.
3:24 And farther west than the Hawaiian Islands.
3:26 It is 42 miles long, 3-5 miles wide and forms part of the southern boundary of the Bering Sea.
3:38 The southern end of the island is low.
3:41 The higher northwest and has peaks up to 1200 feet.
3:44 The central section is mostly rolling tundra, flat table land.
3:50 Amchitka Island has not had a full time residence for a hundred years or more.
3:57 But twice before has been used by agencies of the federal government for defense purposes.
4:03 A role that was recognized in 1913, on the island was made harder the Aleutian Islands National Wildlife Refuge.
4:12 The executive order said in part the establishment this reservation shall not interfere with the use of the islands for a white house, military or naval purposes.
4:26 During world war II, 9extensive facilities were built here, that house 10,000 - 15,000 men.
4:34 Many reminders are their presence on the island, are visible today.
4:53 Tn 1965 the island was temporarily re-inhabited when the Department of Defense conducted operations long-shot. an 80kt underground nuclear detonation, in a program to improve our ability to detect, locate and identify underground nuclear explosion.
5:13 The AEC cooperated in that experiment.
5:16 The AEC activities on Amchitka, began in 1967 and new facilities have been developed at Constantine Harbor, for receiving supplies and equipment by seagoing barges.
5:32 The relatively warm Japanese current keeps the island waters free from ice during the winter months.
5:40 But the trip along the coastline from Seattle to Anchorage, out to Amchitka island, passes through some of roughest water used for commercial shipping.
5:57 The Aleutian chain as some of the worst weather in the world.
6:00 Storms and high winds pass through the area every day.
6:04 Very seldom can clear weather be found over the entire island one-time.
6:16 Since the AEC work began, aircrafts visit the island frequently and make use of reconditioned World War II runway.
6:26 The additional modern runway lighting and ground control approach radar makes landings possible all but the worst weather, and chip guys accessible and workable on a year-round schedule.
6:40 Base camp, the center for construction and support activities, is located on the southern end of the island near the airstrip.
6:51 Offices, warehouses, and general shops are located here as well as the main living quarters.
7:01 Extensive use is being made a existing structures on the island
7:05 Two large aircraft hangars have been repaired for use is covered storage and maintenance shop.
7:10 The hostile environment of Amchitka requires protection from the elements and continuing program, repair and maintenance for vehicles and equipment.
7:26 Facilities installed by the AEC are temporary.
7:30 Many of the units are designed so they may be removed when the Amchitka program is completed.
7:40 Living quarters for up to 750 men have been installed in the base camp area, covered walkways protect occupants from the elements as they move between the dormitory style trailers, and the cafeteria and Recreation Area.
7:59 When AEC activities started on Amchitka, only a jeep trail known as infantry road led to the northwest end of the island with the control point for conducting nuclear test, was to be established.
8:12 Now an all-weather road has been completed along the same route.
8:16 Constant maintenance work is required to keep it open.
8:22 It is slippery in the summer. During the winter months snow often drops 10 to 20 feet high.
8:28 In all construction activities, the AEC has attempted to utilize areas used during the military occupation of the island, to avoid fresh damage to the tundra whatever possible.
8:46 Microwave relay stations keep the northwest end of the island in communication with Basecamp.
8:51 Early in 1969, a cable was laid to carry the firing signal and who relay data from Milrow test location to the control point.
9:04 Project Milrow was designed to yield the answer whether Amchitka could accommodate safely one or more higher yield test necessary for our national defense program.
9:15 Preparations for a possible nuclear test included drilling several large diameter in place with holes on the island.
9:24 Holes, up to 120 inches in diameter and 6,000 feet deep, have been drilled using some of the largest and most powerful drilling equipment in the world.
9:37 The geology and hydrology of the test sites were thoroughly investigated, and found to be satisfactory for testing.
9:59 Since Milrow was to be a calibration test, a nuclear explosive devices known yield was used.
10:05 The actual site for emplacement of the device was approximately four miles northwest to the base camp area in a vertically drilled hole 4,000 feet deep.
実際にデバイスが設置されたのは、ベースキャンプから６．４ｋｍ北西の地点で、地下１２００メートルの深さである。
10:20 With the explosive device at the bottom of the hole, careful refilling or stemming the hole began.
10:25 Alternate layers of sand and gravel early drive by special processing were fed from sealed rubber containers onto a conveyor belt, until the four thousand foot depth the hole have been filled.
10:38 This careful layering is provided, so radioactive materials formed by the detonation will not reach the surface through the drill track.
10:48 The methods for containment radioactive materials have been developed over a number of years at the Nevada Test Site.
10:56 The successful application of these methods in previous higher yield tests including four tests in the Megaton range, has led to a high degree of confidence in the ability to assure containment in tests such as Milrow.
11:13 No underground test conducted by the AEC with the yield the more than fifty kt, has ever resulted in accidental drowning a radioactivity to the surface.
11:30 When Amchitka island was chosen as the site for an underground nuclear calibration test to determine the suitability of the island for possible later test higher yield, an intensive program studies began.
11:46 Participating in the investigations, scientists and technical people for many federal agencies, universities, the state of Alaska and private consulting firms, more than five million dollars has been spent on safety studies and related safety affects evaluations.
12:07 The studies were designed to evaluate possible effects of a nuclear detonation on the ecology of the island.
12:14 Involved in the studies were, tundra, wild flower, and the precious other life in the many lakes and streams on the island, and the coastal waters surrounding it.
12:30 Extensive studies have been made on seismic activity in the vicinity of Amchitka.
12:35 Although the island is located in an active seismic area, the best scientific evidence available to seismologists and other scientists indicate that the possibility have any connection between underground nuclear testing and unusual seismic activity beyond the immediate area, appears to be quite small.
13:00 Archaeological surveys and excavations were conducted that will benefit future studies into the history of Amchitka and the Aleutian island chain.
13:12 76 sites of historical interest were located and 60 of these near the Milrow test hole were excavated.
13:29 Battelle Memorial Institute at Columbus Ohio was delegated the major responsibility for conducting bio environmental studies.
13:37 Part of the program included traffic sea water for scientific study and live transplant other areas in cooperation, the state of Alaska and Department of the Interior.
14:02 The studies were made to provide a basis for predicting, evaluating, documenting possible effects of the test.
14:14 Further purpose of the studies was to determine appropriate measures to be taken in the highly unlikely event of an accidental esscape of radioactivity following the test.
14:38 Particular attention was given to fishes commercial value such as salmon, halibut, and the Pacific Ocean perch
14:48 All species of fish in the waters surrounding Amchitka were examined and documented, before and after the Milrow test. Shrimp and crab in the area were studied as well as the sea otter, bald eagle, peregrine falcon, emperor goose and various duck species
15:11 Due to the migratory patterns of much of the area's wildlife, and the limited fishing season in waters surrounding Amchitka, it was determined that testing could be conducted safely, and with minimal impact on the environment.
15:26 Bio environmental information resulting from these studies has been published and is available to the public
15:36 To respond to many questions from the public and international concern which had been expressed over the possible result of project Milrow, the AEC established in Information Center in Anchorage, Alaska, to provide up-to-date information on the planning and execution of the test.
15:59 Questions regarding ground motion, possible tidal wave or Tsunami, radiation and environmental effects were answered by recognized authorities in these field, formed a special panel to assist in predicting the effects that might be expected.
16:22 As with all nuclear test, the final preparations for Milrow including evacuating from the island all persons not required for the test.
16:31 Helicopters removed all but about 250 men to an offshore ship, where they waited until the test manager gave the word reentry to begin.
16:49 An unusually clear day, favoured the time selected for the test.
16:53 All dry runs and other preparations were completed.
16:57 The test area was deserted
17:00 And the only people left on the island were gathered at the control point about 28 miles from Ground Zero.
17:07 As the hour approaching, live radio broadcast from Amchitka made the press representatives and officials assembled in Anchorage and interested listeners around the world.
17:28 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
17:58 The scientists predictions based on results of the earlier studies proved correct
18:03 Ground motion from the nuclear detonation cause some damage to a few clips in sea stacks that were used as perches and nesting places for some of the island's bird.
18:14 But within three hours bald eagles were observed perching on the sea stacks again.
18:20 Captured sea otters were placed in holding pens, both on the seashore in the ocean at varying distances from Ground Zero, some as close as five thousand feet.
18:40 The otter appeared unharmed by the test, and as usual they were ready to eat courageously as soon as food was given.
18:49 No over pressure effects were reported on any of the sea otter, including one that died apparently from handling stress.
19:09 Some fish species understudy were placed in live holding boxes to determine what effect, overpressure and shock might have upon them.
19:19 After the observation and examination, the fishes were released with the exception that one Dolly Varden trout but it died with no indication as to cause
19:42 Some small stickleback fish were killed by overpressure in lakes near Ground Zero, though Dolly Varden trout in the lakes all survive,
20:00 Along the coastlines near Ground Zero, some rock falls and peat and debris slides occurred
20:07 But helicopter observation in studies of shoreline photography did not detected any resultant damage to the island fish and bird population
20:23 Scuba divers from the University of Washington and the US Department of the Interior revisited underwater locations in areas near Ground Zero.
20:32 They photograph and observe previously place markers on the ocean floor.
20:37 Their observations indicated no noticeable change in the location, the ocean bottom markers.
20:45 There was no evidence of damage to the ocean floor in the immediate vicinity of Amchitka following the detonation.
20:51 AEC's scientists had predicted there would be no release of radioactivity into the surrounding waters, and none has been measured.
21:05 At surface Ground Zero, the building, that housed the instrumentation cable terminals and other diagnostic equipment, was damaged.
21:12 Earlier predictions were that it would most probably collapse.
21:17 A utility trailers station nearby was almost demolished.
21:25 Within three hours after the detonation, workmen and others return to the main camp, and resumed work.
21:32 There was only minor damage to base camp facilities located just four miles from the test site.
21:41 As publicly predicted, ground motion was felt as fairly strong by personnel at the control point, 28 miles from ground zero.
21:51 But the motion was barely perceptible to observers on Adak, about 200 miles away.
21:57 No water waves or tsunami effects were measured other than a very slight level, noted near Amchitka.
22:08 At 37 hours after the detonation, shallows saucer like subsidence formed on the surface near Ground Zero, because of the collapse to the surface of the large spherical cavity or four thousand feet below.
22:22 Following underground explosion similar magnitude in Nevada, many small aftershocks have been recorded on sensitive seismic instruments.
22:31 While a similar increase had been expected in the vicinity of Amchitka, seismic activity after the collapse appeared to be about normal for that region.
22:45 Hundreds of tiny tremors, many of them associated with cavity collapse, were recorded during the first several hours after the event.
22:52 This seismic activity stopped with the broken rock above the explosion induced cavity, collapse to the surface,
23:05 In all areas of concern, the Milrow nuclear calibration test on Amchitka,
had effects as predicted, and indicated that the island would be suitable and safe for future nuclear test of higher yeild.
23:18 The next test tentatively scheduled for the fall of 1971, will be Cannikin, which will have yielded less than 5 Mt.
23:26 Analysis of the Cannikin test results will continue for some time after the detonation.
23:34 Following the test, a drilling program will begin to recover samples from the detonations on underground, and radiochemical analysis at the laboratory.
23:43 Bio environmental programs will continue over a number of years to see if there are any changes in the ecology resulting from underground nuclear test at Amchitka,
Project Milrow (1969) 
アラスカ州アリューシャン列島のAmchitka Islandの核実験は3つで、いずれも地下核実験である。
| Shot | Date Time | Place | Depth | Yeild | Remark |
| Operation Flintlock/ Long shot | 1965/10/29 21:00:00 NST | Amchitka | 42m- 700m | 80kt | test detection of underground nuclear tests |
| Operation Mandrel / Milrow | 1969/10/02 22:06:00 BST | Amchitka | 40m-1220m | 1 Mt | Calibration for Cannikin |
| Operation Grommet / Cannikin | 1971/11/06 22:00:00 BST | Amchitka | 63m-1790m | 4.8Mt | Warhead design for the LIM-49 Spartan |
1964年3月28日のアラスカ地震の津波で124名が死亡したことにより、島嶼での核実験が津波を起こすのではないかという不安がアラスカ州の人々にあった。このこともあり、1969年に米国原子力委員会は、大規模核実験のフィージビリティを確認するProject Milrowを実施した。
[ The Amchitka Program (Declassified U.S. Nuclear Test Film #38) ]
Transacript
0:29 Amchitka Island, far out in the Aleutian island chain of alaska, was the scene on October 2nd 1969 at 12:06 p.m. Bering Daylight Time, where the United States Atomic Energy Commission detonated the Project Milrow nuclear explosive.
0:53 The nuclear explosive device, buried 4,000 feet beneath the surface of the island, at a yield of about one megaton, or approximately the same as some of the largest underground nuclear test in Nevada.
1;10 Role was a calibration test.
1:12 Its effects were measured to determine if larger in nuclear devices could be detonated safely at this remote island.
1;20 Results showed that it is safe to conduct larger test, and one is tentatively scheduled for the fall of 1971.
1:28 This test is called Cannikin.
1:36 The primary testing location for the atomic energy commission, is in the vast areas of the Nevada Test Site, where contained underground nuclear tests have been conducted since 1957, to aid in the development advanced weapons.
1:53 As national defense requirements developed, it became apparent that the Nevada Test Site within about 100 miles of Las Vegas could not be used for some necessary higher yield test, because a possible damage outside structures from ground motion.
2:08 Many new remote areas were examined.
2:14 Martin Basins in Wyoming, remote grazing lands of New Mexico and forward section of Alaska.
2:22 After careful consideration, 3 potential supplemental test areas were identified.
2:30 They are Hot Creek Valley of central Nevada about 90 miles north of present test site, the North Slope of the Brooks Range in Alaska, well beyond the Arctic Circle, and Amchitka Island, far from the Alaskan mainland, in the Aleutian chain.
2:55 Amchitka was selected as having a potential for development, as a location for higher yeild test, nearly 1400 miles from Anchorage, and 2600 miles from Seattle .
3:07 It is isolated from any populated areas.
3:09 The closest person live about 200 miles away at military bases on the islands Adak and Shemya.
3:20 Amchitka is located at about the same latitude as London England.
3:24 And farther west than the Hawaiian Islands.
3:26 It is 42 miles long, 3-5 miles wide and forms part of the southern boundary of the Bering Sea.
3:38 The southern end of the island is low.
3:41 The higher northwest and has peaks up to 1200 feet.
3:44 The central section is mostly rolling tundra, flat table land.
3:50 Amchitka Island has not had a full time residence for a hundred years or more.
3:57 But twice before has been used by agencies of the federal government for defense purposes.
4:03 A role that was recognized in 1913, on the island was made harder the Aleutian Islands National Wildlife Refuge.
4:12 The executive order said in part the establishment this reservation shall not interfere with the use of the islands for a white house, military or naval purposes.
4:26 During world war II, 9extensive facilities were built here, that house 10,000 - 15,000 men.
4:34 Many reminders are their presence on the island, are visible today.
4:53 Tn 1965 the island was temporarily re-inhabited when the Department of Defense conducted operations long-shot. an 80kt underground nuclear detonation, in a program to improve our ability to detect, locate and identify underground nuclear explosion.
5:13 The AEC cooperated in that experiment.
5:16 The AEC activities on Amchitka, began in 1967 and new facilities have been developed at Constantine Harbor, for receiving supplies and equipment by seagoing barges.
5:32 The relatively warm Japanese current keeps the island waters free from ice during the winter months.
5:40 But the trip along the coastline from Seattle to Anchorage, out to Amchitka island, passes through some of roughest water used for commercial shipping.
5:57 The Aleutian chain as some of the worst weather in the world.
6:00 Storms and high winds pass through the area every day.
6:04 Very seldom can clear weather be found over the entire island one-time.
6:16 Since the AEC work began, aircrafts visit the island frequently and make use of reconditioned World War II runway.
6:26 The additional modern runway lighting and ground control approach radar makes landings possible all but the worst weather, and chip guys accessible and workable on a year-round schedule.
6:40 Base camp, the center for construction and support activities, is located on the southern end of the island near the airstrip.
6:51 Offices, warehouses, and general shops are located here as well as the main living quarters.
7:01 Extensive use is being made a existing structures on the island
7:05 Two large aircraft hangars have been repaired for use is covered storage and maintenance shop.
7:10 The hostile environment of Amchitka requires protection from the elements and continuing program, repair and maintenance for vehicles and equipment.
7:26 Facilities installed by the AEC are temporary.
7:30 Many of the units are designed so they may be removed when the Amchitka program is completed.
7:40 Living quarters for up to 750 men have been installed in the base camp area, covered walkways protect occupants from the elements as they move between the dormitory style trailers, and the cafeteria and Recreation Area.
7:59 When AEC activities started on Amchitka, only a jeep trail known as infantry road led to the northwest end of the island with the control point for conducting nuclear test, was to be established.
8:12 Now an all-weather road has been completed along the same route.
8:16 Constant maintenance work is required to keep it open.
8:22 It is slippery in the summer. During the winter months snow often drops 10 to 20 feet high.
8:28 In all construction activities, the AEC has attempted to utilize areas used during the military occupation of the island, to avoid fresh damage to the tundra whatever possible.
8:46 Microwave relay stations keep the northwest end of the island in communication with Basecamp.
8:51 Early in 1969, a cable was laid to carry the firing signal and who relay data from Milrow test location to the control point.
9:04 Project Milrow was designed to yield the answer whether Amchitka could accommodate safely one or more higher yield test necessary for our national defense program.
9:15 Preparations for a possible nuclear test included drilling several large diameter in place with holes on the island.
9:24 Holes, up to 120 inches in diameter and 6,000 feet deep, have been drilled using some of the largest and most powerful drilling equipment in the world.
9:37 The geology and hydrology of the test sites were thoroughly investigated, and found to be satisfactory for testing.
9:59 Since Milrow was to be a calibration test, a nuclear explosive devices known yield was used.
10:05 The actual site for emplacement of the device was approximately four miles northwest to the base camp area in a vertically drilled hole 4,000 feet deep.
実際にデバイスが設置されたのは、ベースキャンプから６．４ｋｍ北西の地点で、地下１２００メートルの深さである。
10:20 With the explosive device at the bottom of the hole, careful refilling or stemming the hole began.
10:25 Alternate layers of sand and gravel early drive by special processing were fed from sealed rubber containers onto a conveyor belt, until the four thousand foot depth the hole have been filled.
10:38 This careful layering is provided, so radioactive materials formed by the detonation will not reach the surface through the drill track.
10:48 The methods for containment radioactive materials have been developed over a number of years at the Nevada Test Site.
10:56 The successful application of these methods in previous higher yield tests including four tests in the Megaton range, has led to a high degree of confidence in the ability to assure containment in tests such as Milrow.
11:13 No underground test conducted by the AEC with the yield the more than fifty kt, has ever resulted in accidental drowning a radioactivity to the surface.
11:30 When Amchitka island was chosen as the site for an underground nuclear calibration test to determine the suitability of the island for possible later test higher yield, an intensive program studies began.
11:46 Participating in the investigations, scientists and technical people for many federal agencies, universities, the state of Alaska and private consulting firms, more than five million dollars has been spent on safety studies and related safety affects evaluations.
12:07 The studies were designed to evaluate possible effects of a nuclear detonation on the ecology of the island.
12:14 Involved in the studies were, tundra, wild flower, and the precious other life in the many lakes and streams on the island, and the coastal waters surrounding it.
12:30 Extensive studies have been made on seismic activity in the vicinity of Amchitka.
12:35 Although the island is located in an active seismic area, the best scientific evidence available to seismologists and other scientists indicate that the possibility have any connection between underground nuclear testing and unusual seismic activity beyond the immediate area, appears to be quite small.
13:00 Archaeological surveys and excavations were conducted that will benefit future studies into the history of Amchitka and the Aleutian island chain.
13:12 76 sites of historical interest were located and 60 of these near the Milrow test hole were excavated.
13:29 Battelle Memorial Institute at Columbus Ohio was delegated the major responsibility for conducting bio environmental studies.
13:37 Part of the program included traffic sea water for scientific study and live transplant other areas in cooperation, the state of Alaska and Department of the Interior.
14:02 The studies were made to provide a basis for predicting, evaluating, documenting possible effects of the test.
14:14 Further purpose of the studies was to determine appropriate measures to be taken in the highly unlikely event of an accidental esscape of radioactivity following the test.
14:38 Particular attention was given to fishes commercial value such as salmon, halibut, and the Pacific Ocean perch
14:48 All species of fish in the waters surrounding Amchitka were examined and documented, before and after the Milrow test. Shrimp and crab in the area were studied as well as the sea otter, bald eagle, peregrine falcon, emperor goose and various duck species
15:11 Due to the migratory patterns of much of the area's wildlife, and the limited fishing season in waters surrounding Amchitka, it was determined that testing could be conducted safely, and with minimal impact on the environment.
15:26 Bio environmental information resulting from these studies has been published and is available to the public
15:36 To respond to many questions from the public and international concern which had been expressed over the possible result of project Milrow, the AEC established in Information Center in Anchorage, Alaska, to provide up-to-date information on the planning and execution of the test.
15:59 Questions regarding ground motion, possible tidal wave or Tsunami, radiation and environmental effects were answered by recognized authorities in these field, formed a special panel to assist in predicting the effects that might be expected.
16:22 As with all nuclear test, the final preparations for Milrow including evacuating from the island all persons not required for the test.
16:31 Helicopters removed all but about 250 men to an offshore ship, where they waited until the test manager gave the word reentry to begin.
16:49 An unusually clear day, favoured the time selected for the test.
16:53 All dry runs and other preparations were completed.
16:57 The test area was deserted
17:00 And the only people left on the island were gathered at the control point about 28 miles from Ground Zero.
17:07 As the hour approaching, live radio broadcast from Amchitka made the press representatives and officials assembled in Anchorage and interested listeners around the world.
17:28 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
17:58 The scientists predictions based on results of the earlier studies proved correct
18:03 Ground motion from the nuclear detonation cause some damage to a few clips in sea stacks that were used as perches and nesting places for some of the island's bird.
18:14 But within three hours bald eagles were observed perching on the sea stacks again.
18:20 Captured sea otters were placed in holding pens, both on the seashore in the ocean at varying distances from Ground Zero, some as close as five thousand feet.
18:40 The otter appeared unharmed by the test, and as usual they were ready to eat courageously as soon as food was given.
18:49 No over pressure effects were reported on any of the sea otter, including one that died apparently from handling stress.
19:09 Some fish species understudy were placed in live holding boxes to determine what effect, overpressure and shock might have upon them.
19:19 After the observation and examination, the fishes were released with the exception that one Dolly Varden trout but it died with no indication as to cause
19:42 Some small stickleback fish were killed by overpressure in lakes near Ground Zero, though Dolly Varden trout in the lakes all survive,
20:00 Along the coastlines near Ground Zero, some rock falls and peat and debris slides occurred
20:07 But helicopter observation in studies of shoreline photography did not detected any resultant damage to the island fish and bird population
20:23 Scuba divers from the University of Washington and the US Department of the Interior revisited underwater locations in areas near Ground Zero.
20:32 They photograph and observe previously place markers on the ocean floor.
20:37 Their observations indicated no noticeable change in the location, the ocean bottom markers.
20:45 There was no evidence of damage to the ocean floor in the immediate vicinity of Amchitka following the detonation.
20:51 AEC's scientists had predicted there would be no release of radioactivity into the surrounding waters, and none has been measured.
21:05 At surface Ground Zero, the building, that housed the instrumentation cable terminals and other diagnostic equipment, was damaged.
21:12 Earlier predictions were that it would most probably collapse.
21:17 A utility trailers station nearby was almost demolished.
21:25 Within three hours after the detonation, workmen and others return to the main camp, and resumed work.
21:32 There was only minor damage to base camp facilities located just four miles from the test site.
21:41 As publicly predicted, ground motion was felt as fairly strong by personnel at the control point, 28 miles from ground zero.
21:51 But the motion was barely perceptible to observers on Adak, about 200 miles away.
21:57 No water waves or tsunami effects were measured other than a very slight level, noted near Amchitka.
22:08 At 37 hours after the detonation, shallows saucer like subsidence formed on the surface near Ground Zero, because of the collapse to the surface of the large spherical cavity or four thousand feet below.
22:22 Following underground explosion similar magnitude in Nevada, many small aftershocks have been recorded on sensitive seismic instruments.
22:31 While a similar increase had been expected in the vicinity of Amchitka, seismic activity after the collapse appeared to be about normal for that region.
22:45 Hundreds of tiny tremors, many of them associated with cavity collapse, were recorded during the first several hours after the event.
22:52 This seismic activity stopped with the broken rock above the explosion induced cavity, collapse to the surface,
23:05 In all areas of concern, the Milrow nuclear calibration test on Amchitka,
had effects as predicted, and indicated that the island would be suitable and safe for future nuclear test of higher yeild.
23:18 The next test tentatively scheduled for the fall of 1971, will be Cannikin, which will have yielded less than 5 Mt.
23:26 Analysis of the Cannikin test results will continue for some time after the detonation.
23:34 Following the test, a drilling program will begin to recover samples from the detonations on underground, and radiochemical analysis at the laboratory.
23:43 Bio environmental programs will continue over a number of years to see if there are any changes in the ecology resulting from underground nuclear test at Amchitka,
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