1975 Hawaii earthquake

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1975 Hawaii earthquake
1975 Hawaii earthquake is located in Hawaii
1975 Hawaii earthquake
UTC time1975-11-29 14:47:43
ISC event 722344
Local dateNovember 29, 1975 (1975-11-29)
Local time04:47:43
MagnitudeMw 7.4 [1]
Depth10 km (6.2 mi) [1]
Epicenter 19°26′N 155°09′W / 19.44°N 155.15°W / 19.44; -155.15
Latitude and Longitude:

19°26′N 155°09′W / 19.44°N 155.15°W / 19.44; -155.15
Areas affected Hawaii
United States
Total damage$4–4.1 million [2] [3]
Max. intensityVIII (Severe) [3]
Tsunami14.3 m (47 ft) [4]
Casualties2 dead [3]
several–28 injured [3] [4]
Animation from NOAA

The 1975 Hawaii earthquake occurred on November 29 with a moment magnitude of 7.4 and a maximum Mercalli intensity of VIII (Severe). The shock affected several of the Hawaiian Islands and resulted in the deaths of two people and up to 28 injured. Significant damage occurred in the southern part of the Big Island totaling $4–4.1 million and it also triggered a small brief eruption of Kilauea volcano.

The event generated a large tsunami that was as high as 47 feet (14 m) on Hawai'i island and was detected in Alaska, California, Japan, Okinawa, Samoa, and on Johnston and Wake Islands. Significant changes to the shorelines along the southern coast of the Big Island with subsidence of 12 feet (3.7 m) was observed, causing some areas to be permanently submerged. The source of the event was the Hilina Slump, which was also responsible for the more powerful 1868 Hawaii earthquake and tsunami.

See also


  1. ^ a b c ISC (2017), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2013), Version 4.0, International Seismological Centre
  2. ^ National Geophysical Data Center / World Data Service (NGDC/WDS), Significant Earthquake Database, National Geophysical Data Center, NOAA, doi: 10.7289/V5TD9V7K
  3. ^ a b c d Stover, C. W.; Coffman, J. L. (1993), Seismicity of the United States, 1568–1989 (Revised) – U.S. Geological Survey Professional Paper 1527, United States Government Printing Office, pp. 205, 210, 211
  4. ^ a b USGS (September 4, 2009), PAGER-CAT Earthquake Catalog, Version 2008_06.1, United States Geological Survey

External links