All earthquakes

Earthquakes in 1984

The USGS located 4,083 earthquakes of magnitude 4.5 or more worldwide in 1984, 133 of them magnitude 6 or more, and 2,840 of magnitude 2.5 or more in the United States. The largest: M7.6 85 km SE of Honiara, Solomon Islands, Feb 8, 1984.

From the USGS catalog. Magnitude 4.5 and up worldwide, and 2.5 and up in the United States. Times are local to each quake.

19831985

Map

Where the largest earthquakes of 1984 were located. Select one for its page.

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The largest

The 25 largest of 1984, by magnitude.

  1. 7.685 km SE of Honiara, Solomon Islands · 18 km deepSolomon Islands
  2. 7.545 km SW of Sarangani, Philippines · 202 km deepPhilippines
  3. 7.491 km SW of Gorontalo, Indonesia · 242 km deepIndonesia
  4. 7.4Izu Islands, Japan region · 457 km deepJapan
  5. 7.34 km NNW of Tabid, Philippines · 649 km deepPhilippines
  6. 7.219 km ENE of Hihifo, Tonga · 128 km deepTonga
  7. 7.2123 km ENE of Shikotan, Russia · 44 km deepRussia
  8. 7.277 km ESE of Owase, Japan · 368 km deepJapan
  9. 7.1190 km SSW of Sibolga, Indonesia · 33 km deepIndonesia
  10. 7.1southeast of the Loyalty Islands · 105 km deep
  11. 7.1central Mid-Atlantic Ridge · 10 km deep
  12. 7.194 km SW of Kokopo, Papua New Guinea · 174 km deepPapua New Guinea
  13. 7.022 km NNW of Gazli, Uzbekistan · 15 km deepUzbekistan
  14. 7.018 km SSW of Mamuju, Indonesia · 33 km deepIndonesia
  15. 6.934 km SE of Nobeoka, Japan · 46 km deepJapan
  16. 6.952 km S of San Pedro de Macorís, Dominican Republic · 24 km deepDominican Republic
  17. 6.9Southwest Indian Ridge · 10 km deep
  18. 6.9Izu Islands, Japan region · 403 km deepJapan
  19. 6.8150 km N of Opotiki, New Zealand · 39 km deepNew Zealand
  20. 6.8Vanuatu region · 33 km deepVanuatu
  21. 6.8166 km SE of Katsuura, Japan · 48 km deepJapan
  22. 6.884 km NNW of Isangel, Vanuatu · 182 km deepVanuatu
  23. 6.761 km E of Ust’-Kamchatsk Staryy, Russia · 33 km deepRussia
  24. 6.7Fiji region · 451 km deepFiji
  25. 6.7217 km W of Ferndale, California · 10 km deepCalifornia

Month by month

Counted by UTC date, which is how the catalog files them.

MonthQuakesLargestWhere
January 19845197.277 km ESE of Owase, Japan
February 19844687.685 km SE of Honiara, Solomon Islands
March 19845807.4Izu Islands, Japan region
April 19845986.9Izu Islands, Japan region
May 19844937.194 km SW of Kokopo, Papua New Guinea
June 19844776.952 km S of San Pedro de Macorís, Dominican Republic
July 19845126.787 km NNE of Tayu, Indonesia
August 19844947.491 km SW of Gorontalo, Indonesia
September 19845726.8166 km SE of Katsuura, Japan
October 19845487.219 km ENE of Hihifo, Tonga
November 19848407.545 km SW of Sarangani, Philippines
December 19845586.8150 km N of Opotiki, New Zealand

By state

Where the year’s United States quakes of magnitude 2.5 and up were located. A state with none that year is not listed.

By country

Where the year’s quakes of magnitude 4.5 and up were located. Quakes at sea, away from any country, are not counted here.

What this means

The catalog is only as complete as the instruments of the time. Worldwide coverage of magnitude 5 and up dates from the 1960s, and of 4.5 from the 1990s; earlier years hold the large quakes and the ones near a station, so a low count in an early year means fewer instruments, not a quiet earth.

By year

Every year the USGS catalog covers.

Sources

Earthquakes, magnitudes, depths, shaking estimates and felt reports from the U.S. Geological Survey Earthquake Hazards Program, read from its live feeds and its catalog back to 1900. Tsunami messages from NOAA’s tsunami warning centers.