Chile quake triggers Pacific tsunami alert

South American Plate
Nazca Plate
Convergent boundary Nazca plate is moving towards South America plate at velocity of 74mm per year

Direction plates push

Sep 16, 22:54GMT (7:54pm) 8.3-magnitude quake about 232km north-west of Santiago. Town of Coquimbo hit by waves up to 4.5 metres high 

Buenos Aires Residents feel tremors

SOUTH AMERICA PLATE
SCOTIA PLATE
PACIFIC PLATE
NORTH AMERICA PLATE
NAZCA PLATE
ANTARCTIC PLATE

BRAZIL
ARGENTINA
CHILE
BOLIVIA
PERU
URUGUAY
PARAGUAY

Santiago
Coquimbo
Iquique

Atlantic Ocean
Pacific Ocean

Source: U.S. Geological Survey