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Tonga earthquakes in 1978

121 earthquakes of magnitude 4.5 or more were located in Tonga in 1978. The largest: M7.0 206 km SE of Hihifo, Tonga, Jun 17, 1978.

From the USGS catalog. Times are local to each quake.

19771979

Map

Where every quake of 1978 was located in Tonga. Select one for its page.

Open the live map with earthquakes

Every quake of 1978

Magnitude 4.5 and up, newest first.

The largest

The 25 largest of 1978 in Tonga.

Month by month

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

MonthQuakesLargestWhere
January 1978105.6south of Tonga
February 1978115.6197 km SSW of Vaini, Tonga
March 1978186.362 km S of ‘Ohonua, Tonga
April 197885.859 km E of ‘Ohonua, Tonga
May 1978155.490 km NNE of Hihifo, Tonga
June 197887.0206 km SE of Hihifo, Tonga
July 1978156.4194 km WNW of Hihifo, Tonga
August 197875.771 km ENE of ‘Ohonua, Tonga
September 1978115.482 km NE of Hihifo, Tonga
October 197865.3270 km W of Haveluloto, Tonga
November 197845.468 km ENE of Hihifo, Tonga
December 197885.344 km E of ‘Ohonua, Tonga

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.

Nearby

Tonga nowWorldwide in 1978

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.