June 20, 1991 Earthquake: Gorontalo, Mamado, Minahassa, Indonesia
A magnitude 7.5 earthquake struck Gorontalo, Mamado, Minahassa, Indonesia on June 20, 1991 at 05:18:52 UTC, 31 km below the surface.
Map
Where it struck, with the other significant earthquakes within 200 km. Circles are sized and colored by magnitude; select one for its page.
The earthquake
- Date
- June 20, 1991
- Time
- 05:18:52 UTC
- Place
- Gorontalo, Mamado, Minahassa, Indonesia
- Magnitude
- 7.5 (Mw)
- Focal depth
- 31 km (19 mi)
- Intensity
- 6 on the Modified Mercalli scale
- Tsunami
- None recorded
- Epicenter
- 1.196° N, 122.787° E
- Country
- Indonesia
The toll
- Damage
- Severe (about $5 to $25 million)
- Houses damaged
- 1,500
Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.
What the record says
NCEI’s account, from the sources it cites.
1991, June 20. At least 1,500 houses were damaged (VI) in the Gorontalo area. Felt (IV) in the Manado area and (II) at Poso. (reference #1053)
Other significant earthquakes nearby
Within 200 km, the deadliest first.
- November 16, 2008, Minahassa Peninsula, Indonesia
- April 18, 1990, Bolaang-Gorontalo, Minahassa Peninsula, Indonesia
- November 25, 1997, Minahassa Peninsula,gorontalo, Sulawesi, Indonesia
- January 22, 1905, Minahassa Peninsula, Indonesia
- January 29, 1920, N. Moluccas Islands, Indonesia
- August 25, 1871, Gorontalo, Indonesia
- December 21, 1939, Kalo,luwuk,sula I, Centrtal Sulawesi, Indonesia
- May 28, 1942, Minahassa Peninsula, Indonesia
- October 16, 1983, Tolitoli, Minahassa, Celebes, Indonesia
- September 11, 1930, Amurang Island, Indonesia
- August 1860, Minahassa, Sulawesi, Indonesia
More
Significant earthquakes of 1991The 1900sEvery quake the USGS located in 1991Recent earthquakes near hereThis day in weather history
Sources
Significant earthquakes from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. NCEI earthquake 5294.