It is associated with a possible eruption in 1979 , and an eruption in 2001 .
The Ahyi Seamount located about 18 km ( 11 mi ) south - east and reached a height of 137 m ( 449 ft ) below sea level .
Ahyi Seamount is associated with a possible eruption in 1979 , and an eruption in 2001 .
The Ahyi Seamount located about 18 km ( 11 mi ) south - east and reached a height of 137 m ( 449 ft ) below sea level .