4
Recorded earthquakes
region
1981
south of Tonga earthquakes in 1981
Earthquake archive for south of Tonga in 1981: 4 recorded events with dates, magnitudes, depths and epicenter details.
Overview
Period at a glance
5.1
Strongest magnitude
4.9
Average magnitude
33.0 km
Average depth
Strongest event
5.1
21 Apr 1981
Analysis of the recorded activity
During 1981, 4 earthquakes were recorded near south of Tonga. Magnitudes ranged from 4.7 to 5.1, with an average of 4.9; depths ranged from 33.0 to 33.0 km, averaging 33.0 km. Activity extended from Friday, March 20, 1981 to Wednesday, September 30, 1981 UTC.
Only 4 earthquakes in the current catalogue match this period and location.
Event list