Deadly Samoa-Tonga earthquake concealed two other quakes, seismic sleuths discover

ScienceDaily (2010-08-19) -- A magnitude-8.1 earthquake and tsunami that killed 192 people last year in Samoa, American Samoa and Tonga was more complicated than initially thought: The 8.1 "great earthquake" concealed and triggered two major quakes of magnitude 7.8, seismologists report.