Eniwetok-Atoll, Landkarte 1:150.000
Eniwetok atoll, map 1:150.000

Eniwetok (jap.: エニウェトック環礁) an island is in the Pacific ocean, which belongs to Marshall Islands. Altogether more than 40 small islands form the complete Eniwetok atoll, which is appropriate for approximately 525 km northwest from Kwajalein. There and on Eniwetok is LORAN - radio beacon installs.

The land mass of all associated islands covers 5.85 km ². The umschlossene lagoon is 1,004, 89 km ² largely. At present live approx. 1,000 inhabitants on the islands. The largest islands are Eniwetok, Engebi (also Arthur called), Parry, Muty and Igurin.

Table of contents

Pacific war

Eroberung durch die USA 1944
conquest by the USA 1944

during the Pacific war the Japanese built in November 1942 a military airport for Eniwetok, in order from here on the Karolinen - and Marshall Islands to check to be able. To 19. The Americans the island in its operation Catchpole conquered February 1944. The complete atoll was to 23. February under their control. On Eniwetok 34 American soldiers lost their life, 94 were wounded and three are missed until today. On Japanese side 700 soldiers and 25 fell went into American shank.

nuclear weapon test

Ivy Mike (Eniwetok atoll - 31. October 1952)

After completion of the Second World War the UN decided that the use of areas of Marshall Islands for security needs of the USA is not subject to any restrictions. Thus the isle became to 31. October 1952 strongly in pulled, when the United States tested there its first hydrogen bomb Ivy Mike with an explosive yield of 10 megatons. Further 43 nuclear weapon explosions followed in the further area, so that the islands were strongly radioactively contaminated . During the atomic bomb tests were stationed approximately 11,000 US technicians, Wissenschafter and military on Eniwetok. For the investigation of the explosion clouds of the bomb tests 1957/58 also some rockets (predominantly of Rockoons) were started [1].

overview of the most important tests

operation sand clay/tone

bomb date place explosive yield
X-Ray 18:17 to 14. April 1948 (GMT) Engebi island 37 kt
Yoke 18:09 30. April 1948 (GMT) Aomon island 49 kt
Zebra 18:04 14. May 1948 (GMT) Runit island 18 kt

operation Greenhouse

Greenhouse-George 20 ms nach der Zündung
Greenhouse George 20 ms after the ignition
bomb date place explosive yield
Dog 18:34 7. April 1951 (GMT) Runit island 81 kt
Easy 18:26 20. April 1951 (GMT) Enjebi island 47 kt
George 21:30 8. May 1951 (GMT) Eberiru island 225 kt
Item 18:17 24. May 1951 (GMT) Enjebi island 45.5 kt

operation Ivy

Ivy-King, Luftaufnahme des Atompilzes
Ivy King, aerial photo of the atomic mushroom
bomb date place explosive yield
Mike 19:14: 59.4 31. October 1952 (GMT) Elugelab island 10.4 Mt
King 23:30 15. November 1952 (GMT) Runit island 500 kt

operation Redwing

Redwing-Seminole kurz nach der Zündung
Redwing Seminole briefly after the ignition
Redwing-Seminole - Fallout
Redwing Seminole - fall out
bomb date place explosive yield
Lacrosse 18:25 4. May 1956 (GMT) Runit island 40 kt
Yuma 19:56 27. May 1956 (GMT) Aomon island 0.19 kt
Erie 18:15 30. May 1956 (GMT) Runit island 14.9 kt
Seminole 00:55 6. June 1956 (GMT) Bogon island 13.7 kt
Blackfoot 18:26 11. June 1956 (GMT) Runit island 8 kt
Kickapoo 23:26 13. June 1956 (GMT) Aomon island 1.49 kt
Osage 01:14 16. June 1956 (GMT) Runit island 1.7 kt
Inca 21:26 21. June 1956 (GMT) Rujoru island 15.2 kt
Mohawk 18:06 2. July 1956 (GMT) Eberiru island 360 kt
Huron 18:12 21. July 1956 (GMT) off Flora island 250 kt

operation Hardtack I

Hardtack-Umbrella, Unterwasserzündung
Hardtack Umbrella, underwater ignition
bomb date place explosive yield
Cactus 18:15 5. May 1958 (GMT) Runit island 18 kt
Yellowwood 2:00 26. May 1958 (GMT) Eniwetok lagoon 330 kt
Umbrella 23:15 8. June 1958 (GMT) Eniwetok lagoon 8 kt
Oak 19:30 28. June 1958 (GMT) Eniwetok today in
the years 1977 to


three islands of the remaining radioactive waste were cleaned for Eniwetok lagoon 8.9 Mt [ work on ]. The contaminated earth was wide cleared away and poured together with in-collected garbage in two Explosionskrater. The Krater originated in to 5. April 1956 with the LaCross and to 5. May 1958 with the Cactus explosion on the Inselchen Runit. Although they were afterwards zubetoniert, is to be measured to today still ionizing radiation, particularly because of plutonium. Runit is prohibited area and can only in 24,000 years (radioactive half-life) again be released.

Alternative names, which are to be found on maps, read:

  • Arthur Insel
  • Brown group
  • of Brown islands
  • Brown's rank
  • Enüwetok
  • Enywetok
  • Parry island

code name of the US Navy during the Pacific war, and/or. the atomic testing time:

  • Begrudge for the whole Eniwetok atoll
  • Downside for Eniwetok
  • Fragile for the Engebi island
  • Heartstrings for the Parry island
  • Outgeneral for the Engebi island
  • Overbuild for the Parry island
  • Privilege for Eniwetok

see also: Atom bomb, fall out, radiation sickness

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coordinates: 11° 22 ' N; 162° 20 ' E


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